Mortgage Lifter Tomato

Solanum lycopersicum (nightshade)

Also known as: Radiator Charlie's Mortgage Lifter

A legendary Depression-era heirloom bred by M.C. "Radiator Charlie" Byles, a self-taught radiator repairman from Logan, West Virginia. With no formal training, Byles spent six years hand-pollinating four large-fruited varieties before landing on this one — then sold seedlings for a dollar each, using the proceeds to pay off his mortgage entirely, which is exactly how the tomato got its name. Massive, meaty, pinkish-red beefsteak fruit — often over a pound, sometimes reaching two or three — with few seeds and a rich, old-fashioned sweetness that has made it one of the most beloved heirloom tomatoes ever grown. Indeterminate (climbing) variety — requires sturdy staking.

Days to harvest 80–85 days from transplant

Fruit size 450–900g+, beefsteak-shaped

Sowing depth 5mm

Germination 6–14 days at 24–29°C

Spacing 60–90cm apart

Aspect Full sun, well-drained soil

Frost tolerance Frost sensitive — needs reliably warm nights

Growing notes

Choose a full-sun, open position with good air circulation. This is a big, vigorous plant that needs plenty of room to sprawl and climb. Large, vigorous habit needs a substantial pot from 40L+ with strong staking

Soil preparation: Rich, well-drained soil with plenty of organic matter worked in.

Support: Sturdy staking or a strong cage essential — vines can reach 2–3m and carry genuinely heavy fruit.

Watering & feeding: Water deeply and consistently, especially as fruit sizes up. Feed regularly with a potassium-rich fertiliser once flowering and fruiting begins.

Harvest: Pick as fruit ripens to a deep pinkish-red. Given the size of the fruit, handle gently to avoid bruising or splitting.

Timing: Expect first harvest around 80–85 days after transplanting, with continued cropping through the warm months.

Key features

Open-pollinated heirloom, bred by "Radiator Charlie" Byles in the 1930s
Massive beefsteak fruit, often 450g–900g, sometimes larger
Rich, sweet, old-fashioned flavour
Meaty flesh with very few seeds
Vigorous, tall-growing vines
One of the most famous heirloom tomato stories ever told

Short season tips

Sow 6–8 weeks before you want to plant out, on a heat mat if possible — soil needs to be 24–29°C to germinate reliably. Transplant only once all risk of frost has passed and nights are reliably mild. Given the size this variety grows to, stake early and generously rather than trying to add support once the plant is established.

Spring
Summer

Tender perennial — most often grown as an annual

Basil (classic tomato pairing) Marigolds Carrots Parsley

Other nightshades (capsicums, chillies, eggplants, potatoes) Fennel Corn

Bred in the early 1930s by M.C. "Radiator Charlie" Byles, an amateur gardener and radiator repairman in Logan, West Virginia, who crossed German Johnson, Beefsteak, and undisclosed Italian and English varieties over six painstaking years of hand pollination. Selling seedlings for a dollar each — a hefty sum during the Depression — he genuinely paid off his home mortgage within six years, giving the tomato its enduring name. Seeds were shared with the Southern Exposure Seed Exchange in the mid-1980s, ensuring this remarkable variety and its story lived on.