Just Grow Something | Evidence-Based Home Gardening

Karin Velez
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Grow a better vegetable garden, whether you're a seasoned gardener or have never grown a thing in your life. Karin helps home gardeners learn to grow their own food using evidence-based techniques and research. She talks all about specific plants, pests, diseases, soil and plant health, mulch, garden planning, and more. It's not just the "how" but also the "why" that makes us better. The goal? For everyone to know how to grow their own food no matter what sized space they have or their experience level. Tune in each week to plan, learn, and grow with your friend in the garden, Karin Velez.

  1. Topping Peppers: What does the science say, yay or nay? - Ep. 299

    5 DAYS AGO

    Topping Peppers: What does the science say, yay or nay? - Ep. 299

    The subject of whether you should top your pepper plants can bring on a pretty strong debate among gardeners. That’s because this is one of those topics where the answer genuinely is: it depends. And I mean that in a very specific, evidence-based way that comes down to two things: your climate and your pepper type. I’ll be straight with you, I do not top my peppers. We are in a zone 6b in west central Missouri and our season is just short enough that for our large sweet peppers, by the time a topped plant recovered and loaded up with new fruit, I’d be in a race with the first frost, so I don’t love my odds of winning. And for our smaller peppers, both hot and sweet, they branch naturally. They’ve never needed my help getting bushy and they generally end up so loaded with fruit there’s no need for me to create new growing points. But that does NOT mean topping is wrong. In fact, if your growing season is long enough and you are growing the right type of pepper, there is a solid, research-grounded argument for it and I want to make that argument fairly today. Let's dig in! References: Illinois Extension (University of Illinois) — Frillman, N. (2021). “Pruning tomatoes and peppers for healthier plants and a stronger harvest.” Flowers, Fruits, and Frass Blog. https://extension.illinois.edu/blogs/flowers-fruits-and-frass/2021-05-17-pruning-tomatoes-and-peppers-healthier-plants-and Nebraska Extension — “Garden Peppers.” University of Nebraska–Lincoln Extension Publications. https://extensionpubs.unl.edu/publication/967/html/view University of Minnesota Extension — Ask Extension response on topping pepper plants (2021). https://ask.extension.org/kb/faq.php?id=740168 University of Minnesota Extension — Weisenhorn, J. Ask Extension response on topping for yield (2016). https://ask.extension.org/kb/faq.php?id=333053 University of Maryland Extension — Home and Garden Information Center. Ask Extension response on topping chile plants (2024). https://ask.extension.org/kb/faq.php?id=869966 University of Minnesota Extension — “Growing Peppers in Home Gardens.” https://extension.umn.edu/vegetables/growing-peppers-home-gardens Peer-Reviewed Research: Humadi, F. (1980). “Effects of plant growth retardants and mechanical topping on growth and yield of pimiento pepper (Capsicum annuum L.).” Dissertation, University of Tennessee. Tennessee Research and Creative Exchange. https://trace.tennessee.edu/utk_graddiss/7869/ Buczkowska, H., & Najda, A. (2001). “Impact of plant topping on chemical composition of sweet pepper fruit.” Zeszyty Naukowe Akademii Techniczno-Rolniczej w Bydgoszczy. Rolnictwo, 46, 33–37. Cao, D., Chabikwa, T., Barbier, F., Dun, E. A., Fichtner, F., Dong, L., Kerr, S. C., & Beveridge, C. A. (2023). “Auxin-independent effects of apical dominance induce changes in phytohormones correlated with bud outgrowth.” Plant Physiology, 192(2), 1420–1434. https://doi.org/10.1093/plphys/kiad034 Avent, A. R., & Armitage, A. M. (2015). “Effects of Paclobutrazol and Pinching on Ornamental Pepper.” HortScience / Journal of the American Society for Horticultural Science. ResearchGate: DOI 10.21273/HORTSCI. Hu, Q., Wei, Y., Gan, X., Zhang, O., Huangpu, J., Hu, B., & Wu, L. (2016). “Effects of pruning methods and harvest time on yield and benefit of pepper in greenhouse.” Jiangsu Agricultural Sciences, 44, 182–185. Resources: Just Grow Something: https://justgrowsomething.com Gardening Courses: https://justgrowsomething.com/courses Just Grow Something Merch and Downloads: https://justgrowsomething.com/shop Just Grow Something Gardening Friends Facebook Group: https://www.facebook.com/share/g/18YgHveF5P/ Check out how you can become a patron on Patreon: https://www.patreon.com/JustGrowSomething Feed my coffee habit: https://buymeacoffee.com/justgrowsomething Amazon storefront: https://www.amazon.com/shop/justgrowsomething Get 10% off and FREE shipping on my favorite raised planters at Planter Box Direct using code JUSTGROW10: https://planterboxdirect.com/?ref=593 Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

    28 min
  2. Growing Tomatoes, Peppers, and Lettuce in Pots - Ep. 298

    28 APR

    Growing Tomatoes, Peppers, and Lettuce in Pots - Ep. 298

    Last week on the show we talked about the basic considerations for growing in containers, and that included how to evaluate whether a crop is a good candidate for growing in a pot. This week we’re digging into the three crops I get asked about the most often when it comes to growing in containers: tomatoes, peppers, and lettuce. And while, technically, you can grow most anything in the right sized pot, these three are the ones folks tend to try first, so we’re going to get specific on them. And yes, each one of them can be very productive in a container. Welcome back to Just Grow Something, I’m Karin Velez, a horticulturist and market farmer who has grown in containers in some way, shape, or form for probably 18 of the 20-plus years I’ve been gardening. I have grown in 6-inch pots all the way up to 100-gallon grow bags – yes, I said 100-gallon and, in all fairness, that’s more like a raised planter bed than a pot – but I’ve been really successful in most instances with just a few failures along the way and I want to teach you how to avoid those mistakes with these popular crops. Let’s dig in. University Extension References Penn State Extension — Container Vegetable Gardening: Four Keys to Success: https://extension.psu.edu/container-vegetable-gardening-four-keys-to-success Penn State Extension — Growing Vegetables and Flowers in Containers: https://extension.psu.edu/growing-vegetables-and-flowers-in-containers Oregon State University Extension — Grow Your Own Peppers (EC 1227): https://extension.oregonstate.edu/catalog/ec-1227-grow-your-own-peppers University of Missouri Extension — Container Gardens to Supply Your Salads: https://extension.missouri.edu/news/container-gardens-to-supply-your-salads North Carolina A&T State University Cooperative Extension — Growing Fruiting Vegetables in Containers: Tomato, Pepper and Eggplant: https://www.ncat.edu/caes/cooperative-extension/covid-19/fruiting-vegetables.php Resources: Just Grow Something: https://justgrowsomething.com Gardening Courses: https://justgrowsomething.com/courses Just Grow Something Merch and Downloads: https://justgrowsomething.com/shop Just Grow Something Gardening Friends Facebook Group: https://www.facebook.com/share/g/18YgHveF5P/ Check out how you can become a patron on Patreon: https://www.patreon.com/JustGrowSomething Feed my coffee habit: https://buymeacoffee.com/justgrowsomething Amazon storefront: https://www.amazon.com/shop/justgrowsomething Get 10% off and FREE shipping on my favorite raised planters at Planter Box Direct using code JUSTGROW10: https://planterboxdirect.com/?ref=593 Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

    26 min
  3. Container Gardening 101 - Ep. 297

    21 APR

    Container Gardening 101 - Ep. 297

    No yard? No tiller? No problem. If you've got a patio, a porch, a balcony, or even a sunny driveway, you can grow a real, productive vegetable garden in containers. Today on Just Grow Something, we walk through the essentials of container gardening from the ground up: how to evaluate whether a crop is a good candidate for a pot, how to pick the right container size based on root system and mature plant size, what kind of soil to use (and what NOT to use), how to feed your plants organically, and the special considerations that make container growing a little different than growing in the ground — things like light, drainage, airflow, watering, and trellising. Whether you're a total beginner or someone adding containers to an existing garden, you'll walk away knowing how to get your best start. Let’s dig in! SHOW NOTES & RESOURCES Resources • Just Grow Something Garden Planning Workbook — https://justgrowsomething.com/shop • Plan Like a Pro Course — https://justgrowsomething.thinkific.com • Days to Maturity reference chart — https://justgrowsomethingpodcast.com/maturity • The Cantry, Belton MO: https://thecantrypantry.com/?page_id=357 • Fabric Grow Bags: https://amzn.to/4vHDHSO • Fish Emulsion: https://amzn.to/4sM7nvg • Kelp Concentrate: https://amzn.to/4u0dcq7 Quick-Reference: Container Size by Crop Small containers (2 gallons, 4–6 in. deep): • Lettuce, spinach, arugula, salad greens, radishes, scallions, basil, cilantro, thyme, mint Medium containers (3–5 gallons, 10–12 in. deep): • Bush beans, Swiss chard, beets, short carrots, dwarf tomatoes, dwarf peppers, compact eggplant, kale, cabbage, larger herbs Large containers (8–15+ gallons, 12–16+ in. deep): • Standard tomatoes (determinate), peppers, eggplant, cucumbers, summer squash, broccoli, large herbs like rosemary Extra-large containers (15–25+ gallons, 18–24 in. deep): • Indeterminate tomatoes, winter squash, large sweet peppers, long-season superhot peppers, bush melons Quick-Reference: Light Requirements • Fruiting vegetables (tomatoes, peppers, eggplant, cucumbers, squash): 6–8+ hours direct sun • Root vegetables (carrots, beets, radishes): at least 6 hours • Leafy greens (lettuce, spinach, chard, kale) and most herbs: at least 4 hours Simple Organic Feeding Schedule • At planting: Mix a balanced granular organic fertilizer (e.g., 4-6-4) into potting mix per label rate. • Every 2 weeks during the growing season: Water with diluted fish emulsion or fish-and-kelp blend (follow label; skip the first 2–3 weeks after transplanting). • When fruiting plants start to flower: Switch to a lower-nitrogen, higher-phosphorous and potassium feed (e.g., 3-4-6 tomato & vegetable formula). University Extension References  https://extension.umd.edu/resource/types-containers-growing-vegetables University of Maryland Extension — Types of Containers for Growing Vegetables https://extension.umd.edu/resource/maintaining-container-grown-vegetables University of Maryland Extension — Maintaining Container Grown Vegetables https://hort.extension.wisc.edu/articles/growing-vegetables-containers/ University of Wisconsin–Madison Division of Extension — Growing Vegetables in Containers (XHT1278) https://extension.psu.edu/container-vegetable-gardening-four-keys-to-success Penn State Extension — Container Vegetable Gardening: Four Keys to Success https://extension.psu.edu/growing-vegetables-and-flowers-in-containers Penn State Extension — Growing Vegetables and Flowers in Containers https://extension.oregonstate.edu/news/container-gardening-grow-vegetables-even-without-yard-space Oregon State University Extension — Container Gardening: Grow Vegetables Even Without Yard Space Just Grow Something: https://justgrowsomething.com Gardening Courses: https://justgrowsomething.com/courses Just Grow Something Merch and Downloads: https://justgrowsomething.com/shop Just Grow Something Gardening Friends Facebook Group: https://www.facebook.com/share/g/18YgHveF5P/ Check out how you can become a patron on Patreon: https://www.patreon.com/JustGrowSomething Feed my coffee habit: https://buymeacoffee.com/justgrowsomething Amazon storefront: https://www.amazon.com/shop/justgrowsomething Get 10% off and FREE shipping on my favorite raised planters at Planter Box Direct using code JUSTGROW10: https://planterboxdirect.com/?ref=593 Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

    41 min
  4. Succession Planting 101: How to Keep Your Garden Producing from Spring Through Frost - Ep. 296

    14 APR

    Succession Planting 101: How to Keep Your Garden Producing from Spring Through Frost - Ep. 296

    Empty beds mean missed harvests. But with the right plan, they're completely avoidable. Today on Just Grow Something I'm walking you through succession planting and relay planting, the strategies that keep your garden productive not just across space, but across time. Whether you're dealing with a four-month growing season or gardening in year-round heat, there's a succession approach that works for your climate. I break down the three types of succession crops, explain how to build a planting calendar that eliminates gaps, and get into relay planting, where you plant your next crop into your current one before it's even finished so there's never a moment of wasted ground. I've also included a full dos and don'ts list, because a few key mistakes can turn a great succession plan into a depleted bed and a missed season. In this episode: The four types of succession planting and when to use each one Rapid, mid-range, and long-season crops and how to succession plant each category Why cucumbers, zucchini, and squash practically require succession planting (and exactly how I do it) Relay planting: how it works, why it's different from interplanting, and some of my favorite pairs Succession strategies by climate: short season, mid-range, and long hot season A full dos and don'ts list, including the disease rotation mistake most gardeners don't see coming This episode pairs with last week's episode on interplanting — together, they give you a complete system for filling every bed, every season. Episode References Episode 43: Succession Planting, Relay Planting, and Interplanting Episode 204: Top Crops to Plant in Succession Throughout the Summer Episode 295 (previous): Interplanting Done Right — High, Low, Fast, Slow Resources Days to Maturity reference chart — justgrowsomethingpodcast.com/maturity Just Grow Something Garden Planning Workbook — justgrowsomething.com/shop Plan Like a Pro Course — justgrowsomething.thinkific.com Succession Crop Quick Reference Rapid Succession (plant every 2–3 weeks): Lettuce, spinach, arugula, radishes, cilantro, green onions, baby bok choy Mid-Range Succession (plant every 3–4 weeks): Bush beans, cucumbers, summer squash/zucchini, determinate tomatoes, sweet corn Split Succession (spring + fall, something else in between): Carrots, beets, broccoli, snap beans (in hot climates), cucumbers & squash (in hot climates) Great Relay Planting Pairs: Spring lettuce → tomatoes → fall lettuce Garlic/onions → peppers Bok choy → summer squash Carrots → sweet corn → carrots Peas → beans or cucumbers Just Grow Something: https://justgrowsomething.com Gardening Courses: https://justgrowsomething.com/courses Just Grow Something Merch and Downloads: https://justgrowsomething.com/shop Just Grow Something Gardening Friends Facebook Group: https://www.facebook.com/share/g/18YgHveF5P/ Check out how you can become a patron on Patreon: https://www.patreon.com/JustGrowSomething Feed my coffee habit: https://buymeacoffee.com/justgrowsomething Amazon storefront: https://www.amazon.com/shop/justgrowsomething Get 10% off and FREE shipping on my favorite raised planters at Planter Box Direct using code JUSTGROW10: https://planterboxdirect.com/?ref=593 Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

    37 min
  5. Interplanting Done Right: The High, Low, Fast, Slow Method for Bigger Harvests - Ep. 295

    7 APR

    Interplanting Done Right: The High, Low, Fast, Slow Method for Bigger Harvests - Ep. 295

    What if you could get more food from the exact same garden space, without expanding a single bed? That's the promise of interplanting, and today on Just Grow Something I break down exactly how to do it right. Building on the "high, low, fast, slow" mantra I use in my own garden and teach in my Plan Like a Pro course, I walk you through the framework that makes interplanting work and the common mistakes that turn it into overcrowding. I cover what to consider before you ever put two plants together (mature size, water needs, nutrient timing, and allelopathy), then get practical with six beginner-friendly pairings that are low-risk and high-reward, plus advanced combinations and experiments for experienced gardeners ready to push further. I've also put together a clear list of dos and don'ts to keep on hand when you're planning your beds. In this episode: What interplanting, intercropping, and companion planting actually mean The "high, low, fast, slow" framework and how to apply it to any bed What to know about your plants before pairing them (and what can go wrong if you don't) Six beginner pairings: tomatoes + basil, lettuce + tomatoes, radishes + carrots, peas + spinach, garlic + peppers, cucumbers + lettuce Advanced ideas: trap cropping, stacked seasonal beds, the Three Sisters and beyond A full dos and don'ts list for interplanting success Let's dig in! Episode References Episode 180: Interplanting to Maximize Your Harvest: https://justgrowsomethingpodcast.com/episode/interplanting-to-maximize-your-harvest-ep-180 Episode 247: Smarter Planting for Bigger Harvests – Interplanting Strategies: https://justgrowsomethingpodcast.com/episode/smarter-planting-for-bigger-harvests-interplanting-strategies-ep-247 254 – Spring Interplanting Strategies: What Worked, What Flopped, and Why: https://justgrowsomethingpodcast.com/episode/spring-interplanting-strategies-what-worked-what-flopped-and-why-ep-254 Resources "Gardening with the Moon Around the World" by Vergers du Monde: https://amzn.to/4cuSmcj Companion Planting Chart download: https://justgrowsomethingpodcast.com/companion Days to Maturity reference chart: https://justgrowsomethingpodcast.com/maturity Just Grow Something Garden Planning Workbook: https://justgrowsomething.com/shop/p/just-grow-something-garden-planning-workbook Plan Like a Pro Course: https://justgrowsomething.thinkific.com Quick-Reference: Beginner Pairings Tomatoes + Basil — HIGH/SLOW + LOW/MED Lettuce + Tomatoes — LOW/FAST + HIGH/SLOW Radishes + Carrots — FAST + SLOW Peas + Spinach — HIGH/FAST + LOW/SLOW Garlic/Onions + Peppers — timing/space efficiency Cucumbers on trellis + Lettuce beneath — HIGH/SLOW + LOW/FAST Next week: succession planting — the strategy that keeps your beds productive across time, not just space. Get 10% off and FREE shipping on my favorite raised planters at Planter Box Direct using code JUSTGROW10: https://planterboxdirect.com/?ref=593 Just Grow Something: https://justgrowsomething.com Gardening Courses: https://justgrowsomething.com/courses Just Grow Something Merch and Downloads: https://justgrowsomething.com/shop Just Grow Something Gardening Friends Facebook Group: https://www.facebook.com/share/g/18YgHveF5P/ Check out how you can become a patron on Patreon: https://www.patreon.com/JustGrowSomething Feed my coffee habit: https://buymeacoffee.com/justgrowsomething Amazon storefront: https://www.amazon.com/shop/justgrowsomething Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

    42 min
  6. Your Greenhouse Operating Manual - Ep. 294

    31 MAR

    Your Greenhouse Operating Manual - Ep. 294

    Get my greenhouse selection guide to help you choose which protected growing structure is right for you: https://justgrowsomethingpodcast.com/greenhouse A protected growing structure isn’t “set it and forget it” but a microclimate you manage. In this final episode of our greenhouse mini-series, you’ll get a practical operating manual for cold frames, low tunnels, caterpillar tunnels, high tunnels, and home greenhouses. We’ll cover ventilation, heating and cooling strategies, watering and irrigation basics, container vs raised-bed vs in-ground considerations, pollination management, and an evidence-based approach to pest and disease control. We’ll also tackle a topic many gardeners miss until something goes wrong: soil health under cover, including salt buildup, nutrient imbalances, and why protected soils often need a different fertility strategy than open-field beds. Let’s dig in! Resources: The thermometer/hygrometer I use to monitor my greenhouse and other garden structures: https://amzn.to/4th56Ja NRCS (USDA) — Controlling the High Tunnel Environment: https://www.nrcs.usda.gov/sites/default/files/2022-10/Controlling-High-Tunnel-Environment.pdf Oklahoma State University Extension — The Hobby Greenhouse: https://extension.okstate.edu/fact-sheets/the-hobby-greenhouse-2 Just Grow Something: https://justgrowsomething.com Gardening Courses: https://justgrowsomething.com/courses Just Grow Something Merch and Downloads: https://justgrowsomething.com/shop Just Grow Something Gardening Friends Facebook Group: https://www.facebook.com/share/g/18YgHveF5P/ Check out how you can become a patron on Patreon: https://www.patreon.com/JustGrowSomething Feed my coffee habit: https://buymeacoffee.com/justgrowsomething Amazon storefront: https://www.amazon.com/shop/justgrowsomething   Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

    41 min
  7. Greenhouse Tradeoffs: Heat, Humidity, Pests, and Practicality - Ep. 293

    24 MAR

    Greenhouse Tradeoffs: Heat, Humidity, Pests, and Practicality - Ep. 293

    Get my free guide to choosing which protected gardening structure you should choose - https://justgrowsomethingpodcast.com/greenhouse Protected growing structures like greenhouses can be game-changers - earlier harvests, fewer rain-splashed diseases, better crop quality, and more reliable timing. But they also create a new microclimate with new rules: overheating, humidity spikes, irrigation demands, shifting pest pressure, and sometimes pollination problems. Today on Just Grow Something, we break down what problems protected culture solves, what it tends to make harder, and how to predict those tradeoffs before you invest. You’ll learn the core principals of tunnels and greenhouses, like temperature, humidity, airflow, and water, plus what changes when you grow in containers, raised beds, or in-ground under cover. Let’s dig in! Resources: High Tunnels and Other Season Extension Techniques - SARE: https://www.sare.org/resources/high-tunnels-and-other-season-extension-techniques/ NRCS (USDA) — Controlling the High Tunnel Environment: https://www.nrcs.usda.gov/sites/default/files/2022-10/Controlling-High-Tunnel-Environment.pdf   Just Grow Something: https://justgrowsomething.com Gardening Courses: https://justgrowsomething.com/courses Just Grow Something Merch and Downloads: https://justgrowsomething.com/shop Just Grow Something Gardening Friends Facebook Group: https://www.facebook.com/share/g/18YgHveF5P/ Check out how you can become a patron on Patreon: https://www.patreon.com/JustGrowSomething Feed my coffee habit: https://buymeacoffee.com/justgrowsomething Amazon storefront: https://www.amazon.com/shop/justgrowsomething   Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

    27 min
  8. How to Pick the Right Greenhouse, Tunnel, or Cold Frame - Ep. 292

    17 MAR

    How to Pick the Right Greenhouse, Tunnel, or Cold Frame - Ep. 292

    Download my Protected Growing Quick Guide to help you make the decision on what type of structure would work best in your garden: https://justgrowsomethingpodcast.com/greenhouse Thinking about a greenhouse but not sure if you really need one? There are some beautiful and expensive options out there, but greenhouses aren’t the only option for extending the season your garden. Today on Just Grow Something, we map out the full spectrum of protected growing structures for home gardeners: from cold frames and covered shelving to low tunnels, caterpillar tunnels, hoop houses/high tunnels, and home greenhouses. You’ll learn what each option is best for, how to match a structure to your goals, space, budget, and maintenance tolerance, and which “hidden factors” make or break success, like site selection, orientation, wind exposure, and snow load. By the end, you’ll have a clear decision framework so you can choose a protected structure that fits your garden and your life, not just your Pinterest board. Resources: Cornell High Tunnels: Structures - https://blogs.cornell.edu/hightunnels/structures/ Penn State Extension: Season Extenders - https://extension.psu.edu/season-extenders-and-growing-fall-vegetables Oklahoma State University Extension: The Hobby Greenhouse: https://extension.okstate.edu/fact-sheets/the-hobby-greenhouse-2.html   Just Grow Something: https://justgrowsomething.com Gardening Courses: https://justgrowsomething.com/courses Just Grow Something Merch and Downloads: https://justgrowsomething.com/shop Just Grow Something Gardening Friends Facebook Group: https://www.facebook.com/share/g/18YgHveF5P/ Check out how you can become a patron on Patreon: https://www.patreon.com/JustGrowSomething Feed my coffee habit: https://buymeacoffee.com/justgrowsomething Amazon storefront: https://www.amazon.com/shop/justgrowsomething Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

    43 min
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About

Grow a better vegetable garden, whether you're a seasoned gardener or have never grown a thing in your life. Karin helps home gardeners learn to grow their own food using evidence-based techniques and research. She talks all about specific plants, pests, diseases, soil and plant health, mulch, garden planning, and more. It's not just the "how" but also the "why" that makes us better. The goal? For everyone to know how to grow their own food no matter what sized space they have or their experience level. Tune in each week to plan, learn, and grow with your friend in the garden, Karin Velez.

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