Science · Plants, Natives & Crops
Watermelon
Heat-loving vine with large fruit; diploid seeded and triploid seedless cultivars have different pollination requirements.
Citrullus lanatus · Warm-season annual fruit crop
Profile
- Light and soil
- Full sun and warm, fertile, well-drained soil
- Pollination
- Triploid seedless varieties need a compatible diploid pollenizer and bees
- Harvest
- Use cultivar cues including a creamy ground spot and nearby tendril drying; fruit does not slip like cantaloupe
- Cultivars
- Sugar Baby is a small-fruited seeded example; size and disease resistance are cultivar-specific
Water & soil targets
- Moisture (VWC)
- Site-calibrated; depends on soil texture
- Salinity tolerance
- Prefer non-saline soils; assess irrigation quality before planting.
- Drought tolerance
- Low for dependable fruit production, especially at flowering and fruit expansion.
Optimal root measurement depth
6–12 in
Most melon water uptake happens in this band. Typical guidance; confirm with a soil probe on site.
Keep moisture even through fruit set and enlargement; avoid saturation and drastic wet-dry cycles. Late-season irrigation may be reduced as fruit matures without severely stressing vines.
Problems to watch
- Fusarium wilt
- Aphids and mosaic viruses
- Spider mites
Stress signs
- Persistent one-sided vine wilt
- Mottled distorted leaves
- Stippled leaves, webbing and reduced fruit growth
Where you'll find it
- Fresh summer fruit
- Space-appropriate kitchen-garden crop
More plants, natives & crops
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All Science profilesGeneral agronomic guidance and typical ranges; actual targets vary by site, soil, climate and season.