Beefsteak Tomato Seeds | Open-Pollinated Heirloom Slicer

Type: Tomato — Large Slicing Heirloom
Botanical Name: Solanum lycopersicum ‘Beefsteak’
Plant Type: Annual — Open-Pollinated
Days to Maturity: 85 days from transplant
Flavour: Rich, meaty, balanced sweet–tart
Fruit Size: 450–900 g (1–2 lb)
Habit: Indeterminate — needs sturdy support

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Beefsteak Tomato — The Original 2-lb Slicing Heirloom

Beefsteak (Solanum lycopersicum ‘Beefsteak’) is the tomato most people picture when they imagine a homegrown slicer: a broad, deeply ribbed, meaty fruit that routinely runs 450–900 g (1–2 lb), with dense flesh and few seed cavities. The flavour is the old-fashioned balance of sweet and tart — not as layered as Brandywine or Cherokee Purple, but bigger, more dependable, and impressive enough that a single fruit covers a whole sandwich.

This is an indeterminate heirloom that North American gardeners have grown for well over a century. At 85 days from transplant it sits in the mid-to-long season, ripening reliably wherever summers are warm and achievable in shorter-season gardens with an early indoor start and a sheltered site. The size is the whole appeal — and the reason the plant needs genuine support, steady moisture, and a little patience. Get those right and you’ll pull thick, garden-warm slices off the vine right through late summer.

🌍 Where Beefsteak Tomatoes Grow Best
🇨🇦 Canada: Grown as an annual in every zone. Easiest in Zones 5–8 — start seeds indoors mid-February to early March. In Zones 3–4, use black plastic mulch, a south-facing wall, and a season-extending cover to bank enough heat for the full 85-day crop.
🇺🇸 US: Annual in all zones. A long, warm summer is ideal — size, colour, and flavour all peak in sustained heat, so the South and lower Midwest ripen Beefsteak with ease.
Best for: fresh slicing, stacked sandwiches and burgers, and any gardener chasing maximum fruit size.
📋 Beefsteak Tomato Quick Reference
Start seeds indoors
6–8 weeks before last frost
Germination
5–10 days at 21–27°C (70–80°F)
Days to maturity
85 days from transplant
Fruit size
450–900 g (1–2 lb)
Plant habit
Indeterminate — sturdy support essential
Spacing
75–90 cm (30–36 in)
Light
Full sun — 8+ hours
Soil pH
6.0–6.8

🌱 How to Grow Beefsteak Tomato Seeds

Start Beefsteak tomato seeds indoors 6–8 weeks before your last frost date, sown 6 mm (¼ in) deep and held at 21–27°C (70–80°F) — at that warmth they germinate in 5–10 days. Once seedlings show their first true leaves, pot them up and give them bright light; leggy, stretched transplants never catch up. Harden off over 7–10 days, then transplant after the last frost has passed and night temperatures stay above 10°C (50°F).

Bury transplants deep — right up to the top few leaves. Tomatoes root along any buried stem, and that extra root mass is exactly what a heavy-fruiting plant like Beefsteak needs. Space plants 75–90 cm (30–36 in) apart in full sun, because this variety builds a large, sprawling frame. Set your support at planting time, not later: a heavy-gauge cage, a stout single stake, or a Florida-weave line. The fruit alone can add several kilos to a single truss, and unsupported branches snap.

Pruning pays off with Beefsteak. Keeping the plant to one or two main stems and removing the side shoots (suckers) channels energy into fewer, larger fruit and opens the canopy for airflow — which matters in humid regions where leaf disease spreads fast. Water deeply and consistently, and mulch heavily; the single biggest cause of split fruit and blossom end rot on big tomatoes is swinging soil moisture. Work in a calcium source at planting — bone meal or a handful of crushed eggshells in the hole — and go easy on high-nitrogen feed, which drives leaves at the expense of fruit. In practice you’ll notice the first fruit sets around eight weeks after transplanting; about four to six weeks before your expected first frost, pinch out the growing tips so the plant ripens what it has instead of starting fruit it can’t finish.

🍅 Harvesting & Preserving Beefsteak Tomatoes

Pick Beefsteak when the fruit has coloured fully and gives slightly to gentle pressure at the blossom end. Because the fruit is so large, the ripening window is short — check plants every 2–3 days at peak season, and in a heat wave (above 32°C / 90°F, when tomatoes stall on colouring) harvest at the first full blush and finish ripening indoors at room temperature. Never refrigerate a ripe tomato: below about 12°C (55°F) the texture goes mealy and the flavour flattens permanently.

Beefsteak is a fresh-eating tomato first, but a glut is easy to put up. The meaty walls roast beautifully — halve the fruit, drizzle with oil, and slow-roast at 120°C (250°F) until concentrated, then freeze in bags. Whole fruit freezes fine for later cooking (the skins slip off under warm water once thawed), and the flesh cans well as crushed tomatoes, though it runs juicier than a dedicated paste type, so expect to cook sauce down longer. For the least work, core and freeze them whole on a tray, then bag once solid.

🍽️ Cooking with Beefsteak Tomatoes

Beefsteak earns its name at the cutting board. One broad slice covers a burger or sandwich edge to edge, and the dense, low-seed flesh holds its shape instead of sliding out — the reason this is the classic BLT and hamburger tomato. Thick slices with flaky salt, a little olive oil, and torn basil are the whole point of growing it, and the same slabs grill well or take a breadcrumb-and-cheese topping for a baked side.

For cooking, lean into fresh preparations: chunky salsa, gazpacho, bruschetta, and quick pan sauces where a little extra juice is welcome. For a thick, smooth marinara you’ll get there, but plan to simmer longer to drive off the higher water content — or blend Beefsteak with a paste variety for body. Its generous size also makes it the natural pick for stuffed baked tomatoes.

🫙 Saving Beefsteak Tomato Seeds

Beefsteak tomato seeds are worth saving because the variety is open-pollinated and grows true to type, and the huge fruit yields a lot of seed from a single tomato. Use the fermentation method: scoop the seeds and surrounding gel into a jar, add a splash of water, and leave it at room temperature for 2–3 days until a film forms on top. That fermentation breaks down the germination-inhibiting gel coat and knocks back seed-borne disease. Pour off the floaters and pulp, rinse the heavy seeds that sank, and dry them on a plate or screen for 1–2 weeks until they snap rather than bend. Stored somewhere cool and dark, they stay viable for 4–5 years.

Two things protect a true-to-type seed line. First, save only from open-pollinated Beefsteak, not from a hybrid “beefsteak-type” tomato — hybrid seed scatters into a mix of parents in the next generation and won’t reproduce the fruit you grew. Second, while tomatoes are self-pollinating and cross rarely, the risk isn’t zero when several varieties flower side by side; if you grow more than one, either space them 3–4.5 m (10–15 ft) apart or cover a few flower trusses with fine cloth to guarantee purity. Before you commit a batch to storage, test viability by sprouting ten seeds on a damp paper towel — if seven or more germinate, the lot is good to keep.

🍅 Browse More Tomato Seeds
Compare Beefsteak against paste, cherry, and other slicers in the full heirloom tomato seed collection.
🌱 Full Growing Guide
New to slicers? Read how to grow tomatoes from seed to harvest for zone-by-zone timing and care.
❓ Beefsteak Tomato FAQ
How big do Beefsteak tomatoes actually get?
Beefsteak fruit routinely reaches 450–700 g (1–1.5 lb) in good garden conditions — rich soil, steady water, a warm summer, and pruning to one or two stems — and can top 900 g (2 lb) on the strongest trusses. In average conditions, expect a solid 300–500 g (0.7–1.1 lb), still far larger than a supermarket tomato. Competition growers pushing single-fruit-per-cluster and heavy feeding produce the record-book giants.
How long do Beefsteak tomatoes take to grow from seed?
Beefsteak matures about 85 days from transplant, not from seeding. Add the 6–8 weeks of indoor growing before transplant and the seed-to-first-ripe-fruit span is roughly four months. That’s why an early indoor start is essential in cooler regions — direct sowing outdoors rarely leaves enough warm season to finish the crop.
Are Beefsteak tomatoes determinate or indeterminate?
Beefsteak is indeterminate — it grows and sets fruit continuously on a vining frame until frost, rather than ripening one concentrated flush like a determinate bush type. That means it needs tall, sturdy support and ongoing pruning, but it also rewards you with fresh slicing tomatoes over a long window instead of all at once.
Why do my Beefsteak tomatoes get blossom end rot?
Blossom end rot — that sunken brown patch on the fruit base — is a calcium-delivery problem driven by uneven watering, not usually a lack of calcium in the soil. When moisture swings between bone-dry and soaked, the plant can’t move calcium into the fast-growing fruit. Large varieties like Beefsteak are hit hardest. Fix it with consistent deep watering, heavy mulch to buffer the soil, a calcium source (bone meal or crushed eggshells) worked in at planting, and restraint with high-nitrogen fertilizer.
Should I prune Beefsteak tomatoes, and how?
Yes — Beefsteak responds strongly to pruning. Pinch out the suckers (the shoots in the crotch between the main stem and each leaf) to hold the plant to one or two main stems. That focuses energy into fewer, bigger fruit, improves airflow to cut disease, and helps the crop ripen before frost in short seasons. Also strip the lowest leaves once they touch the soil to reduce disease splash-up.
What’s the best support for heavy Beefsteak fruit?
Skip flimsy wire cone cages — Beefsteak will flatten them. Use a heavy-gauge welded-wire cage, a 2.4 m (8 ft) stake driven deep and tied every 20–30 cm (8–12 in), or a Florida-weave line between T-posts for a row. Put the support in at transplant time so you don’t damage roots later, and tie loosely with soft cloth strips to avoid girdling the stem as it thickens.
Why are my Beefsteak tomatoes cracking or splitting?
Cracking comes from a sudden surge of water into ripening fruit — classically a heavy rain or deep soak after a dry spell, when the interior swells faster than the skin can stretch. Large thin-skinned tomatoes like Beefsteak are especially prone. Keep watering even and mulched, harvest promptly as fruit colours up (don’t let ripe fruit sit through a storm), and pick at first full blush during wet weather to finish indoors.
Can I grow Beefsteak tomatoes in a container?
You can, but go big — a minimum 40–50 L (10–15 gallon) pot per plant. Beefsteak’s large frame and heavy fruit demand more root room and far more consistent water than a small container can hold; undersized pots dry out fast and trigger blossom end rot and cracking. Use a rich potting mix, feed regularly, and anchor a sturdy stake or cage to the pot so a fruit-laden plant doesn’t tip.
Can I grow Beefsteak tomatoes in a short, cool season?
Yes, with a head start. In Canadian Zones 3–4 and the northern US, an 85-day tomato needs every warm day you can give it: start seeds indoors 6–8 weeks early, warm the soil with black plastic mulch, plant against a south-facing wall or in a raised bed, and use row cover or a wall-of-water early on. Pruning hard to one stem and topping the plant in late summer pushes it to ripen fruit before frost. Our tomato growing guide breaks down timing by zone.
Can I save seeds from Beefsteak tomatoes?
Yes — Beefsteak is open-pollinated, so saved seed grows true to type, and one big fruit gives you plenty. Ferment the seeds and gel in a jar of water for 2–3 days, rinse the seeds that sink, and dry them for 1–2 weeks before storing cool and dark for 4–5 years. Our seed-saving guide walks through the fermentation step in detail.
🍅 The Classic. Up to 2 lb Per Tomato.
Grow the heirloom slicer that made homegrown tomatoes famous — open-pollinated, 85 days, and big enough to cover a sandwich in one cut.
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Seed Quantity

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