Watermelon

Days to harvest

65–80 days

Sunlight

8–12 hours/day

Watering

5–7 per day

Plant spacing

200 cm

Minimum container size

50cm deep × 60cm wide

Container-friendly

1 plants per container

Estimated yield

850 kg / 100m²

Life span

annual

Climate Requirements

Ideal temperature

25-35 °C

Annual rainfall

400-600 mm

Humidity

60-70%

Heat tolerance

moderate

Drought tolerance

moderate

Soil & Planting

Companion Plants

• Sweet Cornstrong

  Corn provides wind break and partial shade; watermelon ground cover suppresses weeds around corn

• Radishmoderate

  Radish trap crop diverts flea beetles from watermelon seedlings; radish harvested before vines spread

• Sweet Basilmoderate

  Basil repels aphids and attracts pollinators essential for watermelon fruit set

Plants to Avoid Nearby

• Pumpkin

  Both Cucurbitaceae sharing powdery mildew, fusarium wilt, and cucumber beetle; concentrated pest pressure

• Zucchini

  Both Cucurbitaceae; shared pest and disease vectors including powdery mildew and squash bugs

Common Pests & Diseases

Safety Notes

Monitor for fusarium wilt in watermelon — rotate planting location annually. Observe 7-day PHI. Heavy feeder — follow fertiliser schedule to avoid excess nitrogen. Tap test for ripeness rather than cutting.

Market Demand

Very High — peak demand Ramadan season; year-round consumption; seedless varieties premium

Regional Notes

Sabah/Kelantan major producers. Seedless varieties fetch RM 2.5-4/kg. Chinese New Year and Ramadan demand spikes create pricing opportunity.

Sources

• Vegetable Growing Guide for Malaysia — DOA Malaysia · Last reviewed: 2026-04-12