Beefsteak tomato / Slicing tomato (Solanum lycopersicum) growing guide

Quick facts

Category: fruiting
Difficulty: intermediate
Days to harvest: 75 to 100 days
Harvest type: continuous production over weeks or months
Spacing: 60 cm between plants

Environment

Temperature: 18–28°C
pH: 5.5 to 6.5
EC (hydroponic): 2 to 3.5 mS/cm
Daily light: 22 to 30 mol/m²/day (strict, will fail outside this range)

Climate and zones

USDA zones: 10 to 13 (winter low around -1°C or warmer)
Frost tolerance: frost sensitive (dies at first frost)
Season: warm (summer crops, frost-sensitive)

Viable growing environments:

outdoor year-round (in zone)
outdoor in growing season (annual)
unheated greenhouse / hoop house
heated greenhouse
indoor (heated home)
indoor hydroponics under grow lights

USDA zone bounds reflect outdoor year-round survival. Anywhere outside the bounded zone range, this crop still grows as an annual in the warm months (outdoor_seasonal), under cover (greenhouse), or indoors under lights.

Growing systems

Beefsteak tomato works in:

drip / Dutch buckets
media bed (ebb and flow)
soil bed

Root mass is very heavy - thin-channel systems (NFT, vertical towers) can't hold this crop mechanically, hence the system list above.

Growing media

The substrate the roots sit in. Choice depends on the system (clay pebbles don't fit NFT channels; rockwool isn't used in media beds) and the crop (beefsteak tomato works in the media listed below).

Medium	pH effect	Water retention	Bacterial surface
Expanded clay pebbles (LECA)	neutral / inert	low	high
Coco coir (Coconut coir)	slightly acidic	high	moderate
Perlite (Expanded volcanic glass)	neutral / inert	very low	low
Rockwool (Mineral wool)	alkaline until pre-soaked	very high	low
Soil-based mix (Potting soil)	varies by source	high	high

Bacterial surface area matters for aquaponics: clay pebbles, lava rock, and pumice double as biofilter substrate. Low-surface media (rockwool, perlite, pea gravel) work in hydroponics but need a separate biofilter in aquaponics.

Nutrient demand by stage

NPK ratios are relative weights at each growth stage; the nutrient mix calculator scales them to absolute grams or ml. EC targets shift through the plant's life: seedlings need a much lighter solution than fruiting adults.

Stage	N	P	K	EC target (mS/cm)
seedling	1	1	1	1
vegetative	3	1	2	2.2
flowering	2	2	3	2.6
fruiting	1	2	4	3

Companion-growing notes

Heavy uptake of potassium, calcium, phosphorus. Co-grown crops with the same demand will end up deficient even at "correct" EC. Plan around this in shared reservoirs.
Releases compounds through the roots that can mildly inhibit other crops in the same reservoir or bed. The effect is usually subtle but worth knowing if neighbors look stunted.
Very high transpiration. Reservoir level drops fast once the plant is mature; expect daily top-ups and watch for EC creeping up as water evaporates faster than salts.

Aquaponics suitability

Compatible with typical aquaponics nutrient profiles. Fish waste provides enough nitrogen for healthy growth; supplemental potassium, calcium, and iron may still be needed depending on fish stocking density.

Care notes

A high-value hydroponic crop that rewards careful management. Dutch bucket, drip-to-waste, or large DWC systems work best for indeterminate beefsteak varieties (which grow as continuous vines rather than compact bushes). EC 2.5-4.0 mS/cm (higher than smaller tomato types; beefsteaks need strong nutrient concentrations for the large fruit). pH 5.5-6.5. Temperature: 20–28°C daytime, 15–18°C night (the day-night differential improves fruit quality). Very high light demand (DLI 22-35 mol/m2/day; beefsteaks need more light than any other common hydroponic vegetable). Train indeterminate vines up strings or stakes, removing suckers (side shoots) to maintain a single or double leader. Support heavy fruits with clips or slings. Calcium is critical: blossom end rot (BER) is the most common problem on beefsteaks because the large fruits demand more calcium transport than smaller types. Maintain calcium at 150-200 ppm in the feed solution and ensure steady, consistent watering (calcium uptake depends on transpiration, which depends on water delivery). Pruning bottom leaves up to the first ripening truss improves airflow and reduces disease. Harvest when fruits are fully colored and slightly soft to pressure. Each plant produces 5-15 large fruits over a season, totaling 3–8 kg per plant.

Notable varieties

A starting shortlist of cultivars worth knowing about. Not exhaustive: the seed catalogs list hundreds of named varieties. These are the ones home growers commonly choose between.

Cultivar	Type	Breeder / origin	Days	Size	Notes
Brandywine	heirloom		90	450 g	Pre-1885 Amish heirloom. Pink-red, deeply lobed fruit with intense complex flavor most growers rate as the gold standard. Low yield (a few large fruits per truss), prone to cracking, long season. Indeterminate, reaches 2.5m.
Cherokee Purple	heirloom		80	380 g	Tennessee Cherokee heirloom released to the seed trade in 1990. Dusky purple-brown shoulders, brick-red flesh, rich savory flavor distinct from any red beefsteak. More productive than Brandywine; somewhat disease-prone in humid summers.
Big Boy	hybrid	Burpee	78	450 g	Burpee's 1949 release; one of the first F1 hybrid tomatoes sold to home gardeners. Indeterminate, disease-resistant (VFN). Reliable productivity in a wide climate range. Flavor is solid mid-tier; chosen for yield and consistency rather than peak taste.
Mortgage Lifter	heirloom		85	500 g	West Virginia 1930s heirloom, named because the breeder reportedly paid off his mortgage selling seedlings. Pink-red fruit often topping 500g. Mild sweet flavor, low acid. Productive; one of the easier large heirlooms for less-than-ideal climates.
Black Krim	heirloom		80	280 g	Crimean heirloom. Smaller than most beefsteaks (around 280g) but with deep mahogany-purple shoulders and savory salty flavor. Tolerates heat better than Brandywine; cracks easily after rain.
Beefmaster	hybrid	Burpee	80	700 g	F1 selected for fruit size (often 700g+ per fruit, occasionally over 1kg). Disease resistance package (VFN). Less complex flavor than the heirlooms but the size makes it the choice for stuffed tomato dishes and burger slicing.