Citrullus lanatus 'Crimson Sweet'
fruitCrimson Sweet is a classic round, blocky watermelon with a pale green rind striped in dark green and crisp, sweet, deep-red flesh, with fruit typically weighing 15 to 25 pounds. The vigorous vines need a long, hot season, ripening in about 85 to 90 days, and the variety is prized for high sugar content and good disease resistance.
Sun
full sun
Water
Every 3 days
Harvest
~85 days
Difficulty
easy
Lifecycle
annual
One season, then done
Spacing
36-72 in. apart
Planting Depth
1 in.
Soil pH
6.0-6.8
Soil Type
Rich, well-draining
Hardiness Zones
Zones 3 – 11
Grown as an annual — this range is its winter hardiness, but you can grow it for a single season in any zone.
When to Fertilize
At planting and at vining; ease off as fruit ripens
Fertilizer
Balanced early, lower nitrogen at fruiting
Watermelon needs heat and a long season, so direct sow after the soil is reliably above 65 to 70F, or start indoors a few weeks early in short-season areas, in full sun and rich, well-drained soil. Give the sprawling vines ample room, water deeply and evenly while the vines grow and the fruit sets, then ease off as the melons ripen to concentrate the sugars. Black plastic mulch warms the soil and helps in cooler climates.
Start seeds indoors
Mar 25
Transplant outdoors
Apr 29
Projected first harvest
Jul 23
Good neighbors that attract beneficial insects or deter pests
Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide
Row cover until flowering then remove for pollination; use a Blue Hubbard trap crop at the edge; mulch with straw
Clear debris, hand-pick, and crush egg clusters
Space widely, water at the base, and improve airflow
Judge ripeness by several signs together: the curly tendril nearest the fruit dries and turns brown, the ground spot where the melon rests turns from white to creamy yellow, the rind dulls and loses its shine, and the melon sounds hollow when thumped. Cut the ripe melon from the vine with a short stem, since watermelons do not ripen further once picked.
Watermelon is low in calories and over 90 percent water, making it very hydrating, and it is a leading source of lycopene, the red antioxidant also found in tomatoes, along with vitamins A and C.
For educational and informational purposes only — HomeSown is not medical, health, or other professional advice. Always positively identify any plant before handling or eating it; some plants, and some parts of otherwise-edible plants, are toxic. Consult a qualified professional before consuming or otherwise using any plant, especially if you are pregnant, nursing, taking medication, or have a health condition.