How to Grow Calabash Bottle Gourd Seeds (Pugua / Nam Tao / Yao / Lauki / Opo):
Calabash Bottle Gourd is a warm-season climbing vine that needs heat to germinate and grow fast. Sow seeds when weather is consistently warm and soil stays above about 20–22°C (68–72°F); in tropical climates you can sow most of the year, but the best results come in the warm, drier season. For quicker sprouting, soak seeds in warm water 6–12 hours before planting. Direct sow 2–3 cm (about 1 inch) deep in fertile, well-drained soil, spacing 60–90 cm (24–36 in) apart. If starting in pots, transplant gently at 3–4 true leaves since roots dislike disturbance. Set up a trellis, net, or fence at planting time—vines grow aggressively and need support. Keep soil evenly moist until germination, usually 7–14 days in warm conditions.
How to Care for Calabash Bottle Gourd:
Give full sun (6–8+ hours) for best flowering and fruiting. Water deeply and regularly; bottle gourd enjoys steady moisture, especially once it starts blooming and setting fruit, but hates waterlogged soil. Mulch helps keep roots cool and prevents moisture swings. Feed every 2–3 weeks with compost, compost tea, or a balanced vegetable fertilizer; when flowering begins, switch to a fruiting/bloom-leaning feed (lower nitrogen, higher potassium) to boost yield. Train vines onto the trellis and pinch the growing tip after it reaches the top to encourage side branches and more female flowers. Watch for pests like aphids, whiteflies, squash bugs, fruit flies, and powdery mildew—good airflow, watering at soil level, and early neem/soap treatment help a lot. Harvest fruits young and tender (usually 20–30 cm long, skin still soft); picking often keeps the plant producing. If you want dried gourds for crafts, leave a few fruits to fully mature on the vine until the skin hardens.
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