Early Girl is an indeterminate tomato. Despite its name suggesting a quick, compact plant that finishes early, it keeps growing, flowering, and setting fruit continuously throughout the season until frost or disease shuts it down. The confusion is understandable: “early” in the name refers to how quickly the first ripe fruits appear (typically around 50 to 60 days from transplant), not to how the plant grows or when it stops producing. This distinction matters for how you stake it, prune it, and plan your garden space.
What Indeterminate Actually Means for Your Plant
An indeterminate tomato vine does not have a built-in stop signal. Its main stem keeps extending, alternating between leaf growth and flower clusters, for as long as growing conditions allow. A determinate tomato, by contrast, is genetically programmed to terminate its main shoot after producing a set number of flower clusters. The shoot essentially caps itself, the plant concentrates its energy into ripening the fruit it already has, and that is more or less the end of the line.
The difference comes down to a single gene called SELF-PRUNING. In determinate tomatoes, both copies of this gene carry a recessive mutation that causes the plant’s growing points to progressively shorten the gaps between flower clusters until the shoot ends in back-to-back flowers with no more vegetative growth between them.1PubMed. The SELF-PRUNING gene of tomato regulates vegetative to reproductive switching of sympodial meristems and is the ortholog of CEN and TFL1 Indeterminate varieties carry at least one functional copy of the gene, so the plant never gets that termination signal. It just keeps climbing.
For a gardener, the practical upshot is straightforward. An Early Girl plant will keep producing new trusses of fruit all summer. You will not get one big concentrated harvest the way you might with a determinate paste tomato bred for canning. Instead, you get a steady trickle of medium-sized, round tomatoes from midsummer until the first hard freeze. That extended harvest window is one reason Early Girl has remained one of the most popular home-garden varieties for decades.
Why the Name Misleads People
The word “early” in Early Girl refers to days to maturity, which in tomato catalogs means the number of days from transplanting a seedling into the garden until the first ripe fruit. At roughly 50 to 62 days depending on conditions, Early Girl is among the fastest full-sized slicing tomatoes you can grow. Many indeterminate beefsteak types take 75 to 85 days or more. That speed is the entire selling point of the variety.
People sometimes assume that a tomato producing fruit quickly must be determinate, because determinate varieties are also known for delivering fruit on a relatively predictable, compressed schedule. But the two traits are independent. Early Girl achieves its speed through breeding for rapid fruit development, not through a shortened growth habit. Once those first fruits ripen, the plant does not stop. It is already setting its next round.
There is also a related variety called Early Girl Bush, sometimes sold as Bush Early Girl, which is determinate. This adds to the confusion. If a seed packet or plant tag says “Early Girl” without the word “bush,” you are getting the original indeterminate vine. If it says “Bush Early Girl” or “Early Girl Bush Improved,” that is the compact determinate version bred specifically for containers and small spaces. Always check the label carefully; the two behave very differently in the garden.
How the Three Growth Habits Compare
Tomatoes actually come in three growth habits, not two. Besides determinate and indeterminate, there is a third category called semi-determinate. All three are controlled by variation in the same SELF-PRUNING gene family, along with a related gene called SINGLE FLOWER TRUSS that acts as the plant’s flowering hormone signal.2PubMed. Semi-determinate growth habit adjusts the vegetative-to-reproductive balance and increases productivity and water-use efficiency in tomato (Solanum lycopersicum)
Semi-determinate plants carry a separate recessive gene (designated sdt in research) that gives them more flower clusters on the main stem than a true determinate, but they still eventually terminate.3HortScience. Genetics of Semideterminate Growth Habit in Tomato They are a middle ground: taller than a bush tomato, shorter than a full-season indeterminate vine, and producing fruit over a longer window than a determinate but not indefinitely. Some gardeners describe their semi-determinate plants as “well-behaved indeterminates,” which is a reasonable mental model.
Early Girl is none of this middle ground. It is fully indeterminate, with the standard functional SELF-PRUNING gene that keeps its vines growing unchecked. In a warm climate with a long season, an Early Girl plant can easily reach six to eight feet tall and will need serious support to stay upright.
Staking, Caging, and Support
Because Early Girl is indeterminate, it needs robust support from the start. A flimsy cone-shaped tomato cage from a hardware store might hold up a determinate variety that tops out at three or four feet, but it will buckle under a full-grown Early Girl loaded with fruit. Your main options are tall cages made from concrete-reinforcing wire, wooden or metal stakes at least six feet tall, or a string trellis system if you are growing in rows.
If you stake, you will probably need to prune suckers more aggressively. Suckers are the shoots that emerge in the crotch between the main stem and a leaf branch. On an indeterminate plant, each sucker becomes a whole new vine with its own flower clusters, and left unchecked, you can end up with a sprawling mass of foliage that is hard to manage and prone to disease from poor air circulation. Pruning to one or two main leaders keeps the plant tidier, lets you train it up a single stake, and tends to push the plant toward earlier and slightly larger fruit, though the total fruit count may drop.
Research on pruning methods confirms that removing suckers reduces flower clusters per plant, which predictably lowers total yield.4Oregon Vegetables. Tomato Yield and Quality Affected by Pruning Method Greenhouse trials have also found that pruned plants set and ripen fruit earlier than unpruned ones, though the total yield differences between single-leader and double-leader systems were not large enough to be statistically definitive.5Bhutanese Journal of Agriculture. Effect of Different Pruning Systems on Yield and Quality of Tomato Grown Under Greenhouse For a home gardener growing Early Girl, the tradeoff is practical: more pruning gives you a neater, more manageable plant that fruits a bit earlier (which is the whole reason you planted Early Girl in the first place), at the cost of somewhat fewer total tomatoes across the season.
If you use tall wire cages and let the plant branch more freely, you will get a bushier, more productive plant but one that needs wider spacing, typically three feet or more between plants. Either approach works. The wrong approach is no support at all, because an indeterminate vine sprawling on the ground invites soil-borne diseases and makes finding ripe fruit an archaeological exercise.
Growing Early Girl in Containers
Indeterminate tomatoes in containers are doable but demanding. Early Girl’s vigor means it needs a large pot, at minimum five gallons, though a 10 to 15 gallon container performs much better. Smaller pots dry out too fast and restrict root growth, which stresses the plant and leads to problems like blossom-end rot and reduced fruit size.
The bigger challenge is structural. You still need to stake or cage an Early Girl in a container, and the pot needs to be heavy or stable enough that a six-foot plant loaded with ripening fruit does not topple over in a breeze. Plastic pots are lighter and dry out faster than fabric grow bags, which breathe better but may need more frequent watering. Either way, container-grown indeterminate tomatoes need consistent daily watering and more fertilizer than in-ground plants, because nutrients leach out with every watering cycle.
If container growing is your only option and the height feels unmanageable, that is where Bush Early Girl becomes a better choice. The determinate version was specifically developed for containers and patio gardening, staying compact at around three feet or so. You lose the season-long harvest but gain a much easier container experience.
Flavor, Water Stress, and the Dry-Farming Connection
Early Girl has an interesting second life in parts of coastal California, where it is the variety of choice for dry farming. Dry farming means growing without irrigation once the plants are established, relying entirely on residual soil moisture from winter rains. The plants grow much smaller than irrigated ones, produce fewer and smaller fruit, but the tomatoes are intensely flavored. The concentration of sugars and acids in a water-stressed tomato makes for a remarkably different eating experience compared to the same variety grown with ample water.
Research on dry-farmed tomatoes supports this connection between drought stress and flavor intensity. Studies measuring soluble solids concentration, a proxy for sweetness and overall flavor depth, found that conditions increasing drought stress also increased fruit soluble solids. But there is a catch: the same stress conditions that boost flavor also raise the risk of blossom-end rot, a calcium-related disorder that leaves dark, sunken patches on the bottom of the fruit.6HortTechnology. Evaluating Management Practices for Controlling Blossom-end Rot and Other Blemishes in Dry-farmed Tomato That same research found that reducing fertilizer lowered blossom-end rot but also decreased flavor intensity, creating an awkward tradeoff for growers.
Early Girl became the standard dry-farming variety partly because of its indeterminate habit. The extended season lets the plant slowly pull moisture from deeper soil layers over months, setting fruit gradually rather than all at once. A determinate variety dumps its energy into a single concentrated fruit set, which is harder to sustain without irrigation. Early Girl’s steady, drawn-out production matches the slow drip of available soil moisture in a dry-farmed field.
Common Mistakes When Growing Early Girl
Knowing that Early Girl is indeterminate lets you avoid some of the most common errors gardeners make with this variety:
- Planting too close: Because it keeps growing, Early Girl needs more room than a bush tomato. Spacing plants only 18 inches apart, which is fine for some determinates, will create a tangled jungle by midsummer. Give each plant at least 24 to 36 inches, more if you plan to let it branch freely.
- Stopping care too early: Some gardeners see the first big flush of fruit and assume the plant is done. With Early Girl, that first flush is just the beginning. Keep watering, feeding, and watching for pests through the end of the season, and you will be picking tomatoes weeks after your neighbors’ determinate plants have finished.
- Removing all suckers: Aggressive sucker removal makes sense on a heavily staked single-leader plant, but if you are using a large cage, leaving some suckers gives the plant more flowering sites and more fruit. The key is balance. Remove suckers below the first flower cluster to keep the base clean and improve airflow, and then decide based on your support system how many leaders you want above that point.
- Expecting uniform ripening: Determinate tomatoes ripen most of their fruit within a narrow window, which is useful for canning. Early Girl does not do that. Its fruit ripens in waves over months. Plan to eat or give away tomatoes as they come rather than expecting a single bumper harvest for sauce-making.
The SELF-PRUNING Gene and Why Breeders Care
The genetics behind determinate and indeterminate growth are worth a quick mention because they explain why you see such clean categories on seed packets. The SELF-PRUNING gene is not a spectrum. The functional version (which gives indeterminate growth) is dominant over the mutant version (which gives determinate growth).7PubMed. The SELF-PRUNING gene family in tomato That means a plant only needs one working copy of the gene to grow as an indeterminate vine. To get a true determinate, both copies must carry the mutation.
This has practical implications for seed savers and breeders. If you cross an indeterminate tomato with a determinate one, the offspring will almost always be indeterminate, because the functional gene copy dominates. Getting stable determinate lines requires selecting plants over multiple generations where both gene copies are the recessive form. It also means that labeling on seed packets is generally reliable for this trait: when a breeder says a variety is determinate or indeterminate, they know the genetics with certainty. Unlike flavor or disease resistance, which involve many genes and vary with growing conditions, the growth habit is controlled by a single well-characterized gene. There is no ambiguity in the case of Early Girl. It carries the dominant, functional SELF-PRUNING allele, and it grows accordingly.
When Early Girl Might Not Be Your Best Choice
Knowing Early Girl is indeterminate helps you decide whether it fits your situation. If you live in a region with a very short growing season, say fewer than 90 frost-free days, Early Girl’s quick time to first fruit is appealing but its indeterminate habit means much of its potential production may get cut short by fall frost. In that scenario, a determinate variety bred for short seasons may actually give you more total tomatoes, because it will concentrate its fruit set into the time you have available.
Similarly, if your goal is to put up a large batch of sauce or salsa in one weekend, a determinate paste tomato that ripens most of its fruit in the same two-week window is a better tool for the job. Early Girl’s steady trickle of medium-sized slicing tomatoes is perfect for daily eating, sandwiches, and salads over a long summer, but frustrating if you want 40 pounds of tomatoes at once for canning.
And if space is genuinely tight, a balcony or small raised bed where a six-foot vine would overwhelm the area, the determinate Bush Early Girl or another compact variety will give you fresh tomatoes without the infrastructure demands of a full indeterminate plant. There is no shame in choosing a determinate tomato. They were bred for exactly these situations. The important thing is knowing what you are working with, and with standard Early Girl, you are working with a vine that wants to grow tall and produce all season long.