Watermelon Seeds — Citrullus lanatus

Red-fleshed Watermelon for Summer Eating

Watermelon  (Citrullus lanatus) brings refreshing red flesh to the summer harvest. Slice into wedges for a warm afternoon, chill cubes for a fruit salad, or enjoy a freshly cut piece straight from the kitchen bench.

These trailing annual vines need warmth, sunshine, and enough growing time to ripen their fruit. Give them your warmest sheltered spot and plenty of room, with protection or covered growing especially useful in cooler parts of New Zealand.

Why Gardeners Love It

• 🍉 Red flesh — refreshing watermelon for fresh summer eating
• ☀️ Warm-season growing — a rewarding project for a sunny, sheltered garden
• 🌿 Trailing annual vines — give plants space to spread
• 🥣 Lovely served chilled — enjoy wedges, cubes or fruit salads
• 🌱 Grow from seed — watch each fruit develop from its flower
• 🏡 Covered-growing option — extra warmth can help in shorter summers

Growing Tips for New Zealand

Sow under cover in spring, approximately 3–4 weeks before planting out after frosts have passed. Direct sowing may suit warmer districts in late spring once soil is thoroughly warm. Watermelons dislike cold nights and wet, cold soil.

Sow approximately 2 cm deep in individual pots of seed-raising mix. Keep moist but not waterlogged, ideally around 24–30°C for germination. Seeds commonly emerge in approximately 5–10 days under warm conditions, taking longer when cooler.

Harden off seedlings gradually and transplant while young, keeping roots undisturbed. Choose full sun and fertile, free-draining soil enriched with compost. Allow approximately 1 m between plants and ample room for vines to spread. In cooler districts, a greenhouse or tunnel may provide the warmth needed to ripen fruit.

Water consistently at soil level, especially during flowering and fruit growth, avoiding repeated drying out followed by heavy watering. Mulch to retain moisture while keeping the stem base clear. Feed as needed with a suitable fruiting-vegetable fertiliser.

Allow pollinating insects access to flowers, or hand-pollinate if growing under cover and fruit is not setting. Rest developing fruit on a dry board or other support to keep it off damp soil.

Let fruit ripen on the vine, as watermelon does not become sweeter after picking. Look for several ripeness signs together: a creamy yellow ground spot where the fruit rests, a duller rind, and drying of the tendril closest to the fruit. Do not rely on one sign alone. Cut the stem rather than pulling fruit from the vine, and harvest before autumn frosts.

What’s in the Packet

Each packet contains 25 Watermelon seeds (Citrullus lanatus).

📄 Want to go even deeper? The CHBotanics Propagation from Seeds Manual — Professional Edition — a comprehensive digital PDF covering sowing times, germination, spacing, and much more across dozens of flower and vegetable species, is available as an instant download. 🌱😊