Beefsteak Tomato

The king of slicing tomatoes, producing enormous fruits that can weigh over a pound each with rich, complex flavor. These indeterminate vines need extra-sturdy cages or stakes and benefit from pruning to one or two main stems. Water consistently to avoid blossom end rot on the large fruits, and provide a calcium-rich soil amendment if needed. Beefsteaks take longer to mature but reward patience with unmatched flavor for sandwiches and fresh eating.

Start beefsteak tomato seeds indoors 8-10 weeks before the last frost — earlier than other types because they need the longest growing season. Sow 6mm deep at 24-29°C (75-85°F) in seed-starting mix. Germination takes 5-10 days. Provide 14-16 hours of strong artificial light. Pot up twice: first to 8 cm pots at the 2-leaf stage, then to 12 cm pots 2-3 weeks later to build strong root systems. Harden off thoroughly for 10-14 days before transplanting. Set transplants very deeply — bury 2/3 of the stem to develop maximum root mass, which is essential for supporting the enormous fruit load. Water deeply at transplanting with dilute fish emulsion.

The Season Plate

Your Beefsteak Tomato Year

Composed for Zone 7 · typical seasons · frost passes Apr 2, returns Nov 1

Plant Beefsteak Tomato Feb – May, pick Jul – Sep. Check the planting methods below and set your climate to personalize these windows.

Planting windows

Feb – May

Start seeds indoors · Feb – Mar

Plant young plants · Apr – May

Outdoor planting

Apr – May

follow the method shown for each window

First picking

Jul – Sep

Harvest timing depends on when seedlings move to their final growing position. Estimate from that planting date once it is known.

Composed for —ColdTemperateMildWarmNorthSouthUse my locationUsed once to set your season · only the zone is kept

Week-by-week Beefsteak Tomato reminders watering, feeding and pruning, timed to your dates

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Frost alerts for your garden a warning before a cold night costs you the crop

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Follow-up planting dates plan the next planting for the season

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Beefsteak tomatoes are the ultimate slicing tomato, producing massive fruits that can exceed 450g (1 lb) each, with some competition specimens reaching over 1 kg. All beefsteak varieties are indeterminate, growing continuously until frost and requiring the longest season of any tomato type — 80-100 days from transplant to first ripe fruit. Start seeds indoors 8-10 weeks before the last frost to give plants the longest possible growing season, especially in northern climates.

These vigorous vines need the strongest support of any tomato type. Use extra-tall (1.8m) heavy-gauge wire cages, wooden stakes at least 5 cm thick, or a Florida weave string trellis system. Space plants 60-90 cm apart — they need generous room for their massive root systems and sprawling branches. Prune to 1-2 main stems by removing all suckers (side shoots in leaf axils), which directs energy into fewer but much larger fruits.

Consistent deep watering is absolutely critical for beefsteaks — the large fruits are highly prone to blossom end rot and cracking from irregular moisture. Provide 5 cm of water per week through drip irrigation and mulch heavily with 10 cm of straw. Feed every 2 weeks during fruiting with a potassium-rich fertilizer to support the enormous fruit load. Beefsteaks are slower to ripen than other types and produce fewer fruits per plant, but the flavor and size of each tomato make the extra care worthwhile. In short-season areas, remove new flowers 30 days before the expected first frost to redirect energy into ripening existing fruits.

Basil planted at the base of beefsteak tomatoes is believed to enhance flavor and repels aphids and whiteflies. Carrots benefit from the partial shade of large tomato plants. Marigolds suppress root-knot nematodes that can devastate tomato roots. Deep-rooted plants like borage bring up nutrients from subsoil that benefit shallow-rooted tomato companions. Avoid planting near brassicas (cabbage, broccoli), fennel, and walnuts (juglone toxicity). Space beefsteaks away from other tomato varieties if saving seed, as cross-pollination is possible.

The Society Table

Basil belongs beside it. Cabbage doesn't.

Old growers' knowledge, checked against Beefsteak Tomato's real companion table below — test any plant you're growing.

Grows well in the company of · 3

BasilCarrotMarigold

Keep apart · 2

CabbageFennel

Plant Beefsteak Tomato with good neighboursThe planner flags conflicts before they're in the ground

Related growing guides

Herbs

Basil

A good companion for Beefsteak Tomato

Vegetables

Carrot

A good companion for Beefsteak Tomato

Flowers

Marigold

A good companion for Beefsteak Tomato

Vegetables

Tomato

View growing guide

Beefsteaks are the heaviest feeders among tomatoes. Prepare beds with generous compost (5-8 cm worked in) and a complete tomato fertilizer at planting. Calcium is critical — work in gypsum or bone meal before planting to prevent blossom end rot on the large fruits. Side-dress every 2-3 weeks during the growing season with potassium-rich fertilizer (lower first number, higher last number like 5-10-10) to support fruit development. Avoid excessive nitrogen, which promotes vegetative growth at the expense of fruit size and flavor. Epsom salt (1 tablespoon per plant monthly) provides magnesium for chlorophyll production. Soil pH should be 6.2-6.8.

Ideal Temperature

Hardiness Zone Compatibility

Beefsteak tomatoes reach peak flavor when fully vine-ripened, which can take up to 2 weeks after the first color change begins. Harvest when fruits are deeply and uniformly colored with a slight give when gently squeezed — they should feel heavy for their size. Support large fruits with one hand while cutting the stem with pruners to avoid tearing the vine. If temperatures exceed 35°C (95°F), harvest at the breaker stage (first color change) and ripen indoors at 18-24°C (65-75°F), as extreme heat degrades flavor pigments. Before fall frost, harvest all remaining fruits regardless of ripeness — green beefsteaks ripen slowly indoors or make excellent fried green tomatoes.

Storage & Preservation

Store ripe beefsteaks at room temperature, stem-side down, and use within 3-5 days — never refrigerate, as cold destroys the volatile compounds responsible for tomato flavor. For longer storage, can as crushed or stewed tomatoes in a water bath with added citric acid. Beefsteaks make excellent thick, rich tomato sauce due to their meaty flesh. Freeze whole: wash, core, and freeze on baking sheets, then bag — skins slip off easily when partially thawed. Slice and dehydrate at 57°C (135°F) for concentrated tomato chips. Due to their high water content, beefsteaks require longer cooking to reduce into paste than Roma types.

Late Blight

Disease

Large, dark, water-soaked lesions appear on leaves, stems, and fruits, spreading rapidly in cool, wet weather. White fungal growth may be visible on leaf undersides. Plants can collapse and die within days. The same pathogen that caused the Irish Potato Famine.

Prevention Avoid overhead watering. Ensure wide spacing for air circulation. Apply copper-based fungicide preventively during cool, wet spells. Destroy all infected plant material — do not compost. Monitor local late blight alerts.

Fix: Remove and bag infected plant parts immediately. Apply copper fungicide or chlorothalonil to remaining healthy tissue. In severe outbreaks, removing the entire plant may be necessary to protect neighboring tomatoes.

Blossom End Rot

Disease

A dark, sunken, leathery patch on the bottom of large developing fruits. Especially severe on the first fruits of the season. Caused by calcium transport failure due to inconsistent watering rather than a pathogen.

Prevention Maintain deeply consistent watering through drip irrigation and heavy mulching — this is the single most important prevention measure. Avoid excessive nitrogen. Amend soil with gypsum if calcium is low. Do not over-cultivate roots.

Fix: Remove affected fruits to redirect plant energy. Stabilize watering immediately. Calcium foliar sprays provide limited short-term benefit. The condition usually resolves naturally once watering becomes consistent.

Cracking and Catfacing

Disease

Concentric or radial cracks form on the fruit surface, especially after rain. Catfacing causes misshapen, scarred, puckered bottoms on fruits. Both are worse on large-fruited varieties and in variable weather conditions.

Prevention Maintain even, consistent moisture through drip irrigation and deep mulching. Avoid temperature extremes during flowering — catfacing is caused by cold nights below 13°C (55°F) during bloom. Choose crack-resistant varieties when possible.

Fix: Cracked fruits are safe to eat if harvested promptly before rot sets in. Severely catfaced fruits are edible but aesthetically imperfect — cut away scarred areas. Neither condition is infectious.

Troubleshooting Common Problems

Long time to maturity frustrates gardeners in short-season climates — start seeds extra early indoors and choose faster-maturing varieties like Big Beef (73 days). Blossom end rot is more severe on beefsteaks than any other tomato type due to the large fruit size — consistent deep watering is non-negotiable. Low yield per plant compared to cherry or Roma types is normal — each plant may only produce 10-15 fruits, but each can weigh 280-450g. Catfacing from cool flowering temperatures creates misshapen fruits. Heavy fruits can snap branches — support individual large fruits with cloth slings tied to stakes.

Growing Tips

1. Start seeds earlier than other tomato types — 8-10 weeks before last frost minimum. Beefsteaks have the longest days-to-maturity of any tomato, and every extra week of indoor growing translates to earlier harvests outdoors.
2. Bury transplants deeply — at least 2/3 of the stem underground. Tomatoes form adventitious roots along buried stems, and beefsteaks need the strongest possible root system to support their massive fruit load.
3. Prune aggressively to 1-2 main stems by removing all suckers. Unpruned beefsteaks produce many small, late-ripening fruits instead of the large, impressive tomatoes the variety is grown for.
4. Consistent deep watering is the single most important factor for beefsteak success. Irregular moisture causes blossom end rot on the first fruits and cracking on mature ones — use drip irrigation and mulch heavily with 10 cm of straw.
5. Support heavy fruit trusses individually with cloth slings or old pantyhose tied to stakes. A single beefsteak fruit can weigh 450g or more, enough to snap a branch without support.
6. Feed every 2 weeks during fruiting with a potassium-rich fertilizer (like 5-10-10). Avoid high-nitrogen feeds during fruiting, which promote leafy growth at the expense of fruit size and flavor.
7. In short-season climates, remove all new flowers 30 days before your expected first frost. This forces the plant to redirect energy into ripening the existing green fruits rather than starting new ones that will never mature.
8. If temperatures exceed 35°C (95°F) during ripening, harvest at the breaker stage (first blush of color) and ripen indoors at 18-24°C. Extreme heat degrades lycopene and volatile flavor compounds, producing bland fruit despite the vine-ripened appearance.