Tomatoes are the most popular crop in American home gardens, and for good reason. A sun-warmed tomato picked at peak ripeness tastes nothing like the pale ones from the store.
Learning how to grow tomatoes is simpler than it looks once you understand what the plants need.
In this guide, I’ll walk you through every step, from picking a variety to harvesting ripe fruit. You’ll learn when to plant, how deep to set your transplants, how to water and feed, and how to handle the problems that show up most often.
Choosing Tomato Varieties
The best tomato variety for you depends on your space, your climate, and how you plan to eat the fruit. Cherry types are the easiest for beginners, while bush types suit small spaces and vining types give the longest harvest.
Determinate vs. Indeterminate Tomatoes
Every tomato falls into one of two growth habits. Knowing which one you have shapes how you space, support, and prune the plant.
Determinate tomatoes are often called bush tomatoes. They grow to a set height, usually 3 to 4 feet, then stop. Most of their fruit ripens over a few weeks.
Indeterminate tomatoes are vining plants. They keep growing and producing fruit until frost kills them. Many reach 6 feet or more, so they need tall, sturdy support.
| Feature | Determinate (Bush) | Indeterminate (Vining) |
|---|---|---|
| Height | 3 to 4 feet | 6 feet or more |
| Harvest window | A few weeks | All season until frost |
| Spacing | 18 to 24 inches | 24 to 36 inches |
| Pruning | Very little | Remove suckers |
| Best for | Canning, small spaces | Fresh eating, long harvest |
If you plan to make sauce or can a big batch at once, determinate types make sense. If you want a few tomatoes every week all summer, go with indeterminate.
Tomato Types by Fruit
Tomatoes also differ by fruit size and use. Here are the main groups:
- Cherry tomatoes: Small, sweet, and very productive. They set fruit even when conditions aren’t perfect.
- Slicing tomatoes: Medium to large fruit for sandwiches and salads.
- Beefsteak tomatoes: Very large, meaty fruit that take longer to ripen.
- Paste tomatoes: Dense flesh with less juice, ideal for sauce. Roma and San Marzano are classic examples.
Heirloom varieties offer some of the best flavors. Brandywine is a famous pink beefsteak, Cherokee Purple has a rich, smoky taste, and Amish Paste makes excellent sauce.
Heirlooms can be less disease resistant, though, so mix in a disease-resistant hybrid if blight is common where you live.
Gear to Pick Up Before You Start
Two items make your first season much easier. A pack of tomato seeds gives you far more variety choices than the transplants at a garden center. Even if you buy plants this year, it’s worth trying seeds next time.
Sturdy tomato cages are the other must-have. Flimsy cone-shaped cages often collapse under a full-grown plant. My advice is to look for heavy-gauge wire or square, folding cages at least 4 to 5 feet tall.
When to Plant Tomatoes
Plant tomatoes outside 1 to 2 weeks after your last frost date, once nights stay above about 50°F. Soil should be at least 60°F, and 65 to 70°F is even better.
Why Warm Soil Matters
Tomatoes are warm-season plants. They can’t handle frost, and cold soil stalls their growth for weeks. A tomato planted into cold soil often sits and does nothing.
A plant set out a little later into warm soil usually catches up fast and passes the early one. Patience pays off here. A cheap soil thermometer takes the guesswork out of it.
Planting Dates by Region
Your local last frost date is the key number. Here’s a rough guide for US regions:
| Region | Typical Last Frost | Plant Outside |
|---|---|---|
| South and Southwest (Zones 9 to 11) | January to March | February to March, plus a fall crop |
| Southeast and Mid-Atlantic (Zones 7 to 8) | March to mid-April | Late April to mid-May |
| Midwest and Northeast (Zones 5 to 6) | Mid-April to mid-May | Mid-May to early June |
| Pacific Northwest (Zone 8) | March to April | May, once nights warm |
| Northern states (Zones 3 to 4) | Mid-May to mid-June | Early to mid-June |
These are rough ranges. Look up the frost date for your own ZIP code before you plan your season.
Watch the Temperature Swings
Tomatoes also stop setting fruit when it gets too hot or too cold. Fruit set drops when daytime highs pass about 90°F or nights fall below 55°F.
In hot Southern climates, this means planting early in spring so plants fruit before the summer heat. Many gardeners in the South also plant a second crop in late summer for a fall harvest.
Starting Seeds and Buying Transplants
Start tomato seeds indoors 6 to 8 weeks before your last frost date. If you buy transplants instead, choose short, stocky plants with no flowers or fruit yet.
Starting Tomatoes From Seed
Seeds give you the widest choice of varieties for the lowest cost. Sow them about 1/4 inch deep in a seed-starting mix. Keep the mix moist but not soggy.
Tomato seeds sprout best in warmth, around 70 to 80°F. A seedling heat mat helps a lot in a cool house. Most seeds sprout in 5 to 10 days.
Once seedlings appear, they need strong light. A grow light set a few inches above the plants keeps them sturdy. Seedlings on a dim windowsill stretch out and turn weak and leggy.
When seedlings have their first true leaves, move them into larger pots. Each move to a bigger pot lets you bury the stem a little deeper, building a stronger root system.
Choosing Healthy Transplants
Buying transplants is the easiest route for most beginners. You skip the lights and the timing and go straight to planting.
Look for these signs of a healthy plant:
- Stocky, thick stems about 6 to 10 inches tall
- Deep green leaves with no yellow or spotted patches
- No flowers or fruit yet
- No insects on the undersides of leaves
- Roots that aren’t circling tightly around the pot
A plant already in flower looks tempting, but it often struggles after transplanting. A younger, stockier plant settles in faster and produces more in the long run.
Hardening Off Before Planting
Hardening off gets indoor or greenhouse plants used to sun, wind, and outdoor temperatures. It takes 7 to 10 days. Skipping it can scorch leaves in a single afternoon.
Here’s a simple schedule:
- Days 1 to 2: Set plants outside in shade for about 2 hours.
- Days 3 to 5: Give them a few hours of gentle morning sun.
- Days 6 to 8: Leave them out most of the day.
- Days 9 to 10: Leave them out overnight if nights stay above 50°F.
Keep them watered during this process, since small pots dry out quickly outdoors.
Planting Tomatoes the Right Way
Plant tomatoes deep, burying the stem up to the first set of leaves. The buried stem grows extra roots, which gives you a stronger, more drought-tolerant plant. This is the single most important planting step in how to grow tomatoes well.
Bury the Stem Deep
Tomatoes have a special trick. Those tiny hairs along the stem can turn into roots once they’re buried. More roots mean better water and nutrient uptake.
To plant deep, follow these steps:
- Pinch off the lower leaves, leaving only the top few sets.
- Dig a hole deep enough to bury most of the stem.
- Set the plant so the soil comes up to the first set of remaining leaves.
- Fill in the hole and firm the soil gently.
If your transplant is tall and leggy, dig a shallow trench instead. Lay the stem sideways and gently bend the top upward. Within a few days, the tip turns toward the sun and grows straight.
Add Supports at Planting Time
Put your cages or stakes in right when you plant. Adding them weeks later can tear through the roots that have spread out underground.
For a stake, drive it in 2 to 3 inches from the stem. For a cage, center it over the plant and push the legs firmly into the soil.
Water In and Protect New Plants
Water each plant deeply right after planting. This settles the soil around the roots and removes air pockets.
Plant on a cloudy day or in the evening to reduce transplant stress. Some mild wilting is normal for the first few days. If the sun is harsh, a bit of temporary shade helps young plants settle in.
Sun, Soil and Spacing
Tomatoes need 6 to 8 or more hours of direct sun, loose soil rich in compost with a pH of about 6.2 to 6.8, and enough room for air to move between plants.
Give Them Full Sun
Sun is the fuel for fruit. Tomatoes need at least 6 hours of direct sun a day, and 8 or more gives you the biggest harvests.
Watch your garden for a full day before you choose a spot. Trees, fences, and buildings cast shade that moves through the day. A spot that looks sunny in the morning may be shaded by afternoon.
If you’re short on yard space, containers work well too. My guide to growing tomatoes on a balcony covers pot sizes, compact varieties, and sun needs for small spaces.