When to plant Bougainvillea?

Bougainvillea glabra thrives in full sun and needs excellent drainage, so grow it in a container rather than open ground in temperate climates. Choose a pot at least 30–40 cm in diameter with generous drainage holes. Use a loam-based or sandy potting mix; John Innes No. 2 or No. 3 mixed with extra horticultural grit or sharp sand works well. Avoid peat-heavy composts that stay wet, as bougainvillea is prone to root rot in waterlogged conditions. Plant in May or June once all risk of frost has passed. Position the root ball so the surface sits about 2 cm below the pot rim, backfill with your mix, and firm gently. Water thoroughly after planting to settle the compost, then allow the top few centimetres to dry before watering again—bougainvillea dislikes constantly wet roots. Place the container in the sunniest, most sheltered spot you have: a south-facing patio, courtyard, or against a warm wall is ideal. The more sun and warmth it receives, the better it will flower. If you're planting more than one, space pots at least 150 cm apart to allow for their vigorous spread. Provide a sturdy support—trellis, obelisk, or wall wires—at planting time, as bougainvillea is a fast-growing climber that will quickly need something to scramble over. Tie in the main stems loosely with soft twine. Avoid moving the pot once the plant is established; bougainvillea resents root disturbance and may drop leaves or bracts if stressed. Mulch the surface lightly with gravel or grit to help keep the root zone warm and improve drainage further.