If you have a tomato plant but aren’t sure what type it is, learning how to identify tomato variety is a useful skill. Identifying your tomato variety involves examining key characteristics like leaf structure, fruit shape, and growth habit. This guide will walk you through the process step by step.
How To Identify Tomato Variety
Correctly naming your tomato plant starts with a systematic approach. You will need to look at several parts of the plant, from top to bottom. The main features to check are the plant’s growth pattern, its leaves, the flowers, and of course, the fruit itself. Taking notes or pictures as you go can be very helpful.
Start With The Plant’s Growth Habit
The overall shape and size of your tomato plant is the first major clue. Tomato varieties are broadly categorized into two types: determinate and indeterminate. Knowing which one you have narrows down the possibilities significantly.
Determinate Tomato Plants
Determinate plants grow to a fixed, bushy size and then stop. They tend to set all their fruit within a concentrated period.
- They are often more compact, rarely exceeding 4-5 feet tall.
- Flower clusters form at the ends of branches, signaling the plant to stop growing.
- Most of the fruit ripens around the same time, which is ideal for canning.
- They typically do not require extensive staking, though some support is beneficial.
Indeterminate Tomato Plants
Indeterminate plants continue to grow and produce fruit throughout the growing season until killed by frost.
- They are vining plants that can grow 6-12 feet or more if supported.
- They produce fruit clusters along the sides of the stems, not just at the ends.
- Fruit ripens continuously over a long period, providing a steady harvest.
- They require strong staking, caging, or trellising for support.
- The leaves have a serrated or toothed edge.
- The surface is rugose, meaning it has a wrinkled or puckered appearance.
- They are sometimes reffered to as “potato leaf” opposites, though that’s not quite accurate.
- The leaf margins are completely smooth, resembling potato plant leaves.
- The surface is often less rugose than regular leaves.
- This trait is common in many heirloom varieties like ‘Brandywine’ and ‘Stupice’.
- Dwarf or micro-dwarf varieties have very small, compact leaves.
- Certain varieties may have finer, more delicate leaflets.
- Leaf color can also vary from deep green to a slightly bluish or grayish hue.
- Globe/Round: The classic, spherical tomato shape. Common in many slicers and hybrids like ‘Better Boy’.
- Beefsteak: Large, often ribbed and flattened, with a meaty interior. Think ‘Brandywine’ or ‘Mortgage Lifter’.
- Oblong/Roma/Paste: Egg-shaped or cylindrical, with fewer seeds and thicker walls. Used for sauces, like ‘San Marzano’.
- Cherry: Small, perfect round or slightly oblong, about one-inch diameter. Examples are ‘Sun Gold’ or ‘Sweet 100’.
- Grape: Small and oval, resembling a grape. They often grow in long clusters.
- Pear: Small and teardrop-shaped, usually used for salads or preserves.
- Oxheart: Large, heart-shaped fruit, tapering to a point at the blossom end.
- Red: The most common, ranging from bright scarlet to deep crimson.
- Pink: Often has clear skin and pinkish flesh, like many heirloom beefsteaks.
- Yellow/Orange: Ranges from pale lemon to deep orange. ‘Lemon Boy’ or ‘Persimmon’.
- Green When Ripe: Remains green or emerald when fully ripe, sometimes with a yellow blush. ‘Green Zebra’ is a famous example.
- Purple/Brown/Black: Dark shoulders or fully dark skin, often with green or red interiors. ‘Cherokee Purple’ or ‘Black Krim’.
- Striped/Bicolor: Exhibits stripes or distinct color zones. ‘Tigerella’ or ‘Pineapple’.
- Seed Cavities (Locules): Beefsteaks have many small cavities; paste tomatoes have only two or three large ones.
- Flesh Texture: Is it very meaty and solid (paste tomato), juicy and soft (slicer), or thin-skinned and seedy (some cherries)?
- Flavor: While subjective, note if it’s exceptionally sweet, tart, balanced, or complex. This can support other evidence.
- Simple Cluster: A basic branching pattern with a limited number of flowers, common on larger-fruited varieties.
- Compound or “Forked” Cluster: A highly branched, complex cluster that can bear many fruits, typical of cherry and grape tomatoes.
- The point where the cluster connects to the stem (the “joint”) can be rigid or have a hinge-like flex.
- Some varieties have hairy stems, while others are smoother.
- The color of the stems can sometimes have a purplish tint.
- The “shoulders” of the fruit (the area near the stem) may be smooth or heavily ribbed and green even when ripe.
- Go to websites of major heirloom or specialty seed sellers.
- Use their search or filter functions. You can often filter by leaf type, fruit shape, color, and size.
- Compare your notes to the listed traits of each variety.
- Take clear photos of the whole plant, a close-up of a leaf, a flower cluster, and a ripe fruit cut open.
- Post these on gardening forums or social media groups dedicated to tomato enthusiasts.
- Include all the details you observed: growth habit, leaf type, dimensions, etc.
- They have master gardeners who can assist with plant identification.
- They are familiar with varieties that commonly grow in your specific region.
- They may offer plant ID clinics or have online submission forms.
- They often exhibit more unique and variable shapes, colors, and flavors.
- They are more likely to have traits like potato leaves or unusual fruit colors.
- Seeds saved from an heirloom will produce plants true to the parent.
- They are often noted for uniform shape, size, and disease resistance.
- They are very common in grocery stores and standard garden centers.
- Seeds saved from a hybrid will not grow true; they may revert to traits of one parent plant.
Examine The Leaf Structure And Type
Tomato leaves are not all the same. The pattern, size, and texture of the leaves can point you toward specific variety groups. Pay close attention to the leaf edges and surface.
Regular Leaf Tomatoes
This is the most common leaf type, often seen on standard hybrid and heirloom varieties.
Potato Leaf Tomatoes
This is a distinct genetic trait where the leaflets lack serrations, giving them a smooth edge.
Other Leaf Variations
Some varieties have unique foliage that makes them easier to spot.
Analyze The Fruit Characteristics
The fruit itself provides the most detailed clues for identification. You will need to let at least one tomato fully ripen to its mature color to make a proper assessment. Look at these aspects in order.
Fruit Shape And Size
Shape is one of the most reliable indicators. Common shapes include:
Fruit Color
Color goes far beyond red. Note the skin color and the flesh color when cut open.
Internal Structure And Flavor Profile
Cutting the tomato open reveals important clues about its variety and best use.
Observe Flower Clusters And Stem Details
Before the fruit forms, the flowers and stems offer early hints. The structure of the flower cluster can indicate fruit size and type.
Flower Cluster Type
Stem And Stem Joints
Look at the main stem and the smaller fruit stems (pedicels).
Use External Resources For Verification
After you have gathered all your observations, it’s time to compare them with known variety data. You can’t always rely on memory alone.
Consult Seed Catalogs And Databases
Online seed company catalogs are among the best resources. They provide detailed descriptions and photos.
Leverage Gardening Forums And Plant ID Groups
The collective knowledge of experienced gardeners is invaluable.
Check With Your Local Extension Service
Your county’s agricultural extension office is a fantastic, often underused resource.
Special Considerations For Heirloom Vs Hybrid Varieties
Understanding whether your plant is an heirloom or a hybrid can guide your search and set expectations for saved seeds.
Identifying Heirloom Tomatoes
Heirlooms are open-pollinated varieties passed down for generations.
Identifying Hybrid Tomatoes
Hybrids are created by cross-breeding two different parent plants for specific traits.
What To Do If You Cannot Identify The Exact Variety
Sometimes, despite your best efforts, you may not find an exact match. This is common, especially with hybrids or if the seed packet was mislabeled.
In this case, you can still provide a very useful descriptive identification. Create a name based on its key traits. For example: “Indeterminate, regular leaf, large pink beefsteak with ribbed shoulders.” This is often just as helpful for gardening purposes. You can also choose to save seeds and grow it again next year, giving it your own unique name.
FAQ: How To Identify Tomato Variety
How can I tell what kind of tomato plant I have?
You can tell by examining its growth habit (determinate or indeterminate), leaf type (regular or potato leaf), and the detailed characteristics of the ripe fruit, including its shape, size, color, and internal structure.
Is there an app to identify tomato varieties?
While general plant ID apps exist, they are often not precise enough for specific tomato varieties. Your most reliable method is to compare your plant’s observed traits with photo databases from reputable seed companies or consult with expert gardeners in online forums.
What is the easiest way to identify an heirloom tomato?
Heirloom tomatoes often have distinctive, non-uniform looks—like pronounced ribbing, unique colors (purple, black, green when ripe), or potato leaves. They also tend to have a more complex flavor profile and seeds that produce identical plants when saved.
Can you identify a tomato plant by its leaves?
Yes, leaf type is a key identifier. The two main types are regular leaves (serrated edges, rugose surface) and potato leaves (smooth edges). This single trait can significantly narrow down the list of possible varieties.
How do I find out the name of an unknown tomato?
Combine your own observations with external research. Take detailed notes and photos, then use online seed catalogs to filter varieties by the traits you see. Posting clear pictures to dedicated tomato gardening groups is another very effective strategy for getting help from experienced growers.