Black-eyed Susan vine: Sowing, planting and harvest calendar
How do you sow black-eyed Susan vine under cover?
Sow black-eyed Susan vine, Thunbergia alata, under cover in spring, early enough to raise plants before the warm season. Adjust timing to your climate because this tropical climber is frost sensitive. Prepare drained pots or a tray with light seed compost, moistened before sowing.
Space the seeds and cover them lightly with sieved compost according to the packet. Water gently. Warmth around 20 to 25 °C supports germination. Keep the medium moist without standing water and check temperature, particularly in sunshine behind glass. Ventilate any covering.
After emergence, provide good light and avoid overheating. Once seedlings are developed enough to handle, transplant them into pots with their roots intact. True leaves and a root ball that holds together matter more than one standard height. Let the plants continue growing before moving them into the garden.
Gradually acclimatise them outdoors, initially by day in a sheltered position. Protect them at night while conditions remain cold. Final planting waits until frost risk has passed and temperatures are warm enough. Allow room according to the cultivar and support: these are climbers, so do not automatically crowd them at 20 cm intervals.
How do you sow black-eyed Susan vine outdoors?
When does black-eyed Susan vine flower?
