Buddleja davidii - Butterfly Bush Seeds

To sow buddleia davidii seeds, mix them with damp compost and put them in a plastic bag. Then, place the bag in the fridge for four weeks. From February to March, sow the Butterfly Tree in a seed tray. Use high-quality compost and sieve it on the surface to correctly bind the seed to the soil. Before sowing, compress the compost slightly with a small board. Scatter the seeds, cover them with compost or vermiculite, compress them again, and water them generously with a fine mist. Place the seed tray in the light, without direct sun, at a temperature of 21°C to 24°C. To promote germination, lower the temperature to 18°C at night.
The seedlings will emerge in 20 to 30 days. When the young plants have grown, transplant them into 12cm (4.7 in) pots. Keep the compost damp but not excessive during growth. Gradually acclimate the plants to a temperature of 15°C, starting 15 days before planting them in their final place.
By the end of May or early June, the temperature will be warm enough to plant your young plants in an open, sunny location. Add a scoop of compost to each planting hole and space the plants 2m (6 ft 7 in) apart.
From July to September, regularly remove faded flowers to prevent spontaneous sowing, maintain the beauty of the flowering, and promote further flowering. After the leaves fall (November to March), prune the branches to half their length, remove the bare stems and keep only 5 or 6 branches per plant.