How long does it take to grow a watermelon?

Most icebox and personal-size varieties mature in 70–80 days from transplant; standard picnic types need 85–95 days. Count from the date you set transplants outdoors, not from direct sowing. Per Texas A&M AgriLife, days-to-maturity estimates assume warm growing conditions; a cool summer adds significant time.

Why isn't my watermelon setting fruit?

The most common causes: no female flowers yet (male flowers appear first and are normal), inadequate bee pollination, or excessive heat above 95°F during flowering. Per University of Minnesota Extension, "heat above 95°F can cause poor fruit set." Plants will resume setting fruit once temperatures moderate. Also verify you haven't applied insecticide during flowering hours, which kills pollinators.

Can I grow watermelons vertically?

Small icebox varieties can be trellised vertically with individual fabric slings supporting each fruit as it develops. Standard varieties are too heavy for practical vertical growing in a home garden — the weight of a 25-pound melon puts enormous strain on the vine attachment point. Most growers find horizontal growing far simpler for all but the smallest varieties.

How many watermelons does one plant produce?

Icebox varieties: typically 3–5 fruits per plant. Standard large types: 1–3 fruits per plant, as the plant's energy is concentrated into fewer but larger fruits. Most growers find that removing excess small fruits when they reach tennis-ball size (leaving 2–3 per vine) produces larger, sweeter melons than letting all fruits develop.

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Watermelon Care: How to Grow Sweet Melons in the Home Garden

Q: Which type of watermelon should you grow?

Watermelons are all Citrullus lanatus, but commercial breeding has produced dramatically different varieties suited to different garden sizes and climates. Per Texas A&M AgriLife Extension, the main categories are:

How to grow sweet, crack-free Citrullus lanatus in the home garden — from seed-starting and transplant timing through thumping the melon to check ripeness.

By Thomas Joseph Published 2026-06-11 Updated 2026-06-13 Reviewed by Thomas Joseph 7 min read

Large round watermelons ripening on the vine in a sunny home garden — Photo: Unsplash

Which type of watermelon should you grow?

Watermelons are all Citrullus lanatus, but commercial breeding has produced dramatically different varieties suited to different garden sizes and climates. Per Texas A&M AgriLife Extension, the main categories are:

Icebox and personal-size varieties

Round fruits weighing 6–12 pounds, vines that spread 4–6 feet. Varieties like 'Sugar Baby', 'Crimson Sweet' (compact), and 'Bush Sugar Baby' are standard choices for gardeners with limited space. Days to maturity: 70–80 days. These are the most practical choice for zone 4–6 gardeners working with a shorter heat season.

Standard and picnic types

The 15–30+ pound melons you see at farm stands. 'Jubilee', 'Charleston Gray', and 'Allsweet' are classic varieties. Vine spread of 10–15 feet per plant is common. These need 85–95 warm days to mature and are best suited to zones 7–10 where summers are long and hot.

Seedless varieties

Seedless watermelons require a "pollinator" seeded variety planted alongside them — per University of Minnesota Extension, "you must plant a seeded variety nearby to provide pollen, because seedless varieties produce sterile pollen." Without a pollinator at roughly one seeded plant per three seedless plants, fruit set fails. Most growers find seeded varieties simpler for home gardens.

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