Determinate vs Indeterminate Tomatoes: A Decision Framework

What Determinate and Indeterminate Mean

Determinate tomatoes grow to a set height, stop once they set a terminal bud, and ripen most of their fruit in a short burst. Indeterminate tomatoes have no such stopping point, so the vine keeps growing, flowering and fruiting until frost or disease kills it. Pick determinate plants for one large harvest, a small space or a pot. Pick indeterminate plants for a steady supply of fresh fruit across a long season, and plan on tall support.

The numbers behind those definitions come from extension publications. Oregon State University Extension describes determinate cultivars as fairly short and bushy at 3 to 4 feet tall, with fruit that ripens over “a short period, usually just a couple of weeks.” The same guide says indeterminate plants can easily grow 7 to 8 feet high. University of New Hampshire Extension adds that determinate varieties stop growing once they set a terminal bud, usually at around 4 feet, and that they are typically earlier than indeterminate varieties but have a short and defined production season.

	Determinate	Indeterminate
Other name on tags	Bush	Vining
Plant height	3 to 4 feet	7 to 8 feet or more
Fruit ripens	Over a couple of weeks	Continually until frost
Stake length	4 feet	At least 6 feet
Pruning	Generally none	One or two stems, suckers removed
Fits a container	Yes, 12 inches deep or more	Possible, but less suited

The label describes the plant’s genetics, so it holds for the whole season. That is why it is worth settling before you start seeds or shop for seedlings.

Match the Growth Habit to How You Harvest

Start with what happens to the tomatoes after you pick them. South Dakota State University Extension puts it plainly: determinate tomatoes are great for canning because they produce all their fruit in a short period of time, and indeterminate varieties are the choice for a steady supply all season long.

A batch of sauce or salsa needs many pounds of ripe fruit on the same weekend. A determinate planting delivers that, since most of the crop colors up within a couple of weeks. A row of indeterminate plants spreads its ripe fruit across the season instead, which suits sandwiches and salads and frustrates anyone trying to fill a canner.

Many gardeners grow both. A few determinate paste plants cover the preserving, and one or two indeterminate slicers or cherry tomatoes keep the kitchen supplied until frost. Clemson’s fact sheet notes that it takes 52 to 90 days to reach the first harvest depending on the cultivar, so check the days to maturity on the tag along with the growth habit.

Named Varieties of Each Type

Growth habit is a property of the variety, so the fastest way to learn it is to look the variety up. Clemson Cooperative Extension’s recommended list for home gardens sorts cultivars by habit. Its determinate group includes Roma and Celebrity. Its indeterminate group includes Sun Gold, Better Boy, Brandywine and Cherokee Purple. Oregon State University Extension lists Sungold and Brandywine as indeterminate as well, and Celebrity as determinate.

Fruit type alone does not settle the habit, so confirm it on the tag or in a list like these before you buy. The habit also decides the hardware, which our guide to tomato cages and stakes covers by plant type.

There is also a compact group below the standard determinate plant. University of Maryland Extension notes that midget, patio or dwarf varieties have very compact vines and are best grown in hanging baskets or other containers. University of New Hampshire Extension gives the full range: some tomatoes are only 8 inches high at maturity, and others will sprawl 25 feet if not maintained by pruning.

Staking, Cages and Spacing

Support is where the two types differ most in cost and labor. Oregon State University Extension says indeterminate varieties need stakes at least 6 feet long, and stakes for determinate varieties must be 4 feet long. Clemson gives a similar figure for staked plants: stakes 6 feet tall, driven 1 foot into the soil about 4 to 6 inches from the plant soon after transplanting.

Cages suit determinate plants well, with one caution. Oregon State points out that the typical cone-shaped cages sold in stores will usually support only the smallest cultivars. A homemade cage of wire mesh does better, and the guide suggests making it about 4 to 5 feet tall and at least 18 inches across. Clemson recommends at least 6-inch spacing between the wires so a hand and a ripe tomato can pass through.

Spacing depends on both the habit and the support. University of New Hampshire Extension gives these distances:

Planting	Between plants	Between rows
Staked or caged, either type	18 to 24 inches	At least 5 feet
Unstaked determinate	12 to 24 inches	4 to 6 feet
Unstaked indeterminate	2 to 3 feet	5 to 7 feet

Oregon State allows closer planting, 12 to 18 inches apart, for indeterminate plants that are staked and pruned. Whichever system you pick, set it up early. Clemson’s instruction is to drive stakes soon after transplanting, which follows from the date in when to plant tomatoes outside.

Pruning Needs by Type

Determinate plants are mostly left alone. South Dakota State University Extension states that generally no pruning is needed for determinate types. Oregon State names one exception: side shoots that appear below the bottom flower cluster come off. The plant stops growing at a set size, so shoots removed higher up take part of a fixed crop with them.

Indeterminate plants are the ones that get pruned, and the reason is management more than necessity. Oregon State notes that, strictly speaking, indeterminate plants do not require any more pruning than determinate types, but removing the side shoots in the leaf axils results in larger fruit. Those side shoots are called suckers. South Dakota State says indeterminate types can be pruned to one or two stems and tied directly to stakes.

There is a trade. University of New Hampshire Extension says removing suckers reduces potential yields but increases airflow through the plant. It advises taking suckers off while they are still small, less than 2 inches long. Oregon State’s interval is to inspect the plant every 7 to 10 days and pinch off side shoots as they emerge. If you keep two stems, the one to save is the sucker just below the first flower cluster.

Space, Containers and Season Length

Determinate varieties are the practical choice for pots and tight beds. Oregon State says any tomato cultivar can be raised in a container, although the smaller determinate cultivars are ideal, and it recommends containers at least 12 inches deep, such as a 5-gallon nursery pot. University of New Hampshire Extension’s general rule is one tomato plant per 4 or 5 gallon container. Our guides to balcony vegetable containers and raised beds for vegetables cover the hardware.

Season length cuts both ways. Because determinate varieties are typically earlier, they suit a short frost-free period, where an indeterminate vine might be killed by frost with much of its fruit still green. In a long, hot summer the short season of a determinate plant becomes the drawback. Clemson warns that most early-ripening cultivars are determinate and will not produce tomatoes throughout a South Carolina summer, so southern gardeners who want fruit into fall either grow indeterminate types or set out a second planting.

Reading the Seed Packet or Plant Tag

Packets and tags usually state the habit, though the wording varies. “Determinate” and “bush” mean the same thing, and South Dakota State uses the two terms together. “Indeterminate” and “vining” are the other pair.

A third label, semi-determinate, turns up on some beefsteak varieties. Oregon State describes these as having a growth habit between that of indeterminate and determinate types. The wire cage Oregon State describes, 4 to 5 feet tall, is a reasonable support for a plant of that in-between size.

When a tag gives no habit at all, the mature height is the best clue. A listed height of 3 to 4 feet points to a determinate plant, and anything described as needing a 6-foot stake is indeterminate.