You don’t need a yard to grow food. You need containers, the right varieties, and someone to tell you about fertilizer before your plants look sad.
The Story
My first year back in Wisconsin, I didn’t have a garden. I had a container garden—tomatoes and peppers on whatever surface I had available. No raised beds, no in-ground plot, just pots. It wasn’t the setup I wanted, but it worked well enough that I’ve never stopped growing at least a few things in containers, even now that I have two gardens plus containers spread across two properties.
The two-property situation is a recent development. My son Phil owns a house now, and I grow in his yard too — which is how “Phil’s Plot” became a regular fixture in my garden planning. More space, more options, and more logistics. But the container habits I built that first year have never gone away. Every year I still have a few tomatoes and peppers in pots, and last year I added a potato box. (That deserves its own post.)
The thing about container gardening is that it teaches you something in-ground gardening doesn’t: when conditions aren’t right, you find out fast. Containers are unforgiving. They dry out overnight. They starve quickly. Get it right and you can grow impressive food in a small space. Get it wrong and you’ll have sad plants until someone more experienced than you asks if you’re fertilizing.
Why Container and Raised Bed Gardening
Start where you are. You don’t need land, permission from a homeowner, or a rototiller. A 5-gallon bucket on a balcony can grow a tomato plant. A half wine barrel on a patio can produce peppers all summer. Container gardening has a low barrier to entry — the lessons come later.
Control your soil. In-ground gardening means working with what’s there. Containers and raised beds mean you fill them with exactly what you want: quality potting mix, good drainage, the right pH. If your yard soil is clay or compacted or full of rocks (hello, Wisconsin), growing in containers or raised beds sidesteps the problem entirely.
Extend your season. Containers can be moved indoors or under cover when frost threatens. A container tomato that would have died at the first hard frost can keep producing weeks longer if you can wheel it into the garage.
Accessibility. Raised beds put the garden at a height that works for your body. No bending, no kneeling on hard ground.
Container Gardening: What Actually Works
Pick the Right Size
Bigger isn’t always better — but too small is always a problem. General guidelines:
| Crop | Minimum Container Size |
|---|---|
| Tomatoes (determinate/patio) | 5 gallons |
| Tomatoes (indeterminate) | 10-15 gallons |
| Peppers | 3-5 gallons |
| Potatoes | 10+ gallons (or a dedicated potato box) |
| Herbs | 1-2 gallons |
| Lettuce/greens | 2-3 gallons |
One thing I’ve learned the hard way: don’t buy a container you can’t move. I have one container that’s been in the same spot for two years because I can’t lift it. It’s not terrible — it’s in a decent location — but I lost the flexibility I thought I’d have. If you’re filling a large container, put it where you want it first, then fill it.
New trick I’m trying this year: Put empty aluminum cans in the bottom of large containers before filling with soil. They take up volume, improve drainage, and dramatically reduce the weight. The plants don’t care — their roots won’t reach the bottom anyway.
Water Every Day
This is the most common container gardening mistake, and it catches everyone at first.
Container soil dries out far faster than in-ground soil. On a hot Wisconsin summer day, a container in full sun may need water morning and evening. If you’re planning a vacation, you need a plan for your containers — they cannot go a week without attention the way an established in-ground garden can.
Signs you’re underwatering: wilting in the afternoon heat, soil pulling away from the edges of the container, plants that look fine in the morning and droopy by 2 p.m.
The fix is simple — just water more consistently. A moisture meter helps if you can’t tell by feel.
Fertilize Weekly
This is the lesson I learned from my Uncle Bill, and I wish I’d known it before my plants spent half the summer looking sad.
Container soil doesn’t have the biological activity and nutrient cycling of healthy in-ground soil. Every time you water, nutrients leach out the drainage holes. Within a few weeks of planting, your container plants are hungry — and they’ll look it. Yellowing leaves, slow growth, poor fruit set. They’re not diseased, they’re starving.
Uncle Bill’s solution: half a gallon of diluted Miracle-Gro per plant, once a week. Mix it according to package directions, water each plant with half a gallon of the solution. That’s it. The difference is dramatic — within a week, the plants look like different plants. I’ve followed his advice every year since.
Any balanced water-soluble fertilizer works. The weekly cadence is the important part. Don’t skip weeks and try to double up — consistent feeding beats sporadic heavy doses.
Best Crops for Containers
Not everything grows well in a pot. These do:
- Tomatoes — determinate (bush) varieties are easiest; indeterminate varieties need a large container and sturdy support
- Peppers — all types; they thrive in containers and the heat retention of a dark pot actually helps them
- Herbs — basil, parsley, chives, thyme; the easiest container crops
- Lettuce and greens — fast-growing, shallow roots, perfect for smaller containers
- Green onions/scallions — grow in almost anything
- Potatoes — in a dedicated deep container or potato box; the harvest is satisfying
Crops that struggle in containers: anything with deep taproots (carrots, parsnips), large sprawling plants (winter squash, pumpkins), or plants that need a lot of root space (corn).
Raised Beds: A Different Category
Raised beds are not containers — they’re a different approach with different rules.
A raised bed sits on the ground (or on a hard surface with a bottom liner) and holds a deeper volume of growing medium than any practical container. The soil doesn’t dry out as fast, nutrient depletion is slower, and you can grow almost anything you’d grow in-ground.
What to fill them with: A mix of topsoil, compost, and an aerating amendment like perlite or vermiculite. The “Mel’s Mix” formula (⅓ compost, ⅓ vermiculite, ⅓ peat moss) is a popular starting point. Avoid filling raised beds with pure potting mix — it’s too light and will compact over time.
Size matters for access: Standard raised bed wisdom is no wider than 4 feet — that way you can reach the center from either side without stepping in. I’ve seen people build 6-foot-wide beds and spend the whole season stretching awkwardly across them.
Depth: 6 inches is the minimum for most crops. 12 inches is better. Root crops (carrots, potatoes, beets) need at least 12 inches.
What I grow in raised beds vs. containers:
- Raised beds: tomatoes, peppers, squash, beans, anything with significant root depth
- Containers: overflow plants, herbs I want close to the kitchen, tomatoes and peppers when space in the beds is committed elsewhere
My Raised Bed Plans
I’ve been container gardening for years, but raised beds are still on my to-do list. I have several ideas for where and how to build them — nothing concrete yet. That’s actually one of the things I’ve learned from years of project management: don’t build before you plan. The wrong location, the wrong size, or the wrong construction method means redoing work later.
What I know so far: I want them close enough to water sources that daily watering isn’t a chore, in a location with enough sun for tomatoes and peppers, and built to a size I can actually reach across. The 4-foot width rule is going in the plan from the start — I’ve stretched across too many other people’s oversized beds to make that mistake myself.
When the beds go in, I’ll document the process here. The planning, the build, the first season. That’s the kind of follow-along content that’s more useful than generic advice — real decisions, real results, real mistakes if they happen.
The Sustainability Angle
Growing food in containers and raised beds reduces packaging. Every tomato you grow is one less plastic-wrapped tomato from the store, one less fuel mile for the supply chain to get food to your table.
Compost feeds containers and beds for free. Once you have a compost system running (Composting Basics covers how), kitchen scraps become the fertilizer that supplements your weekly liquid feeding.
Start small. One container tomato plant teaches you more in a season than a year of reading. The goal isn’t a perfect setup — it’s to start.
Links & References
Related Wednesday Wisdom Posts:
- Garden Planning Spreadsheet — how I plan what goes where across multiple growing spaces
- Starting Seeds Indoors — start your container plants from seed to save money and get the varieties you actually want
- Composting Basics — the free fertilizer supplement for containers and raised beds
- Eggshells Aren’t Trash — free calcium for tomato and pepper containers
Coming Soon:
- The Potato Box — growing potatoes in a deep container, how it works and whether it was worth it
Equipment used in this post: As an Amazon Associate, I earn from qualifying purchases.
- XLUX Soil Moisture Meter — takes the guesswork out of watering
- Bootstrap Farmer 1020 Seed Starting Trays — for starting transplants
Container gardening taught me that the limiting factor is almost never space. It’s usually water, fertilizer, or picking a container you can’t move once it’s full.