Blue chip is a new, patio variety of Buddleia, only gets 60 cm high, and has been introduced specifically for pot culture - if you're growing in a container, give it a pot that's at least twice the size of the one its currently in and keep an eye on it to see if it needs repotting within a couple of months. Ordinary multi purpose compost will do, or John Innes No. 2 - if planting in the ground, choose a sunny spot, ordinary garden soil, keep well watered.

Remember to leave about 1/2 cm of the rootball showing once it is planted. Planting too deep is sure but slow death for most plants.

Well I've never heard that before, Tugbrethil - I always plant at the same level or a half a centimetre below - visible root ball means certain death here!

1/2 cm deep will probably do little damage, but the deeper you go, the more trouble it causes. Only a few plants can adapt their stem bark to live underground. Around here, that is compounded by all of the Phytopthora collar rot fungi living in the soil, just waiting for a weakened, delectable morsel!