Aaron_K

Hi SW,

The same basic horticultural principles apply to repotting a 20 year old tree, as they would to a 5 year old tree. Now is coming up to the time of year to repot deciduous trees. As its been over a year since the last time your bonsai was transplanted, I should imagine you will have a wealth of circular roots at the bottom and sides of your pot.

Simply lift the tree from the pot, rake and comb the roots out, check for signs of infestation etc etc, trim and replace in the pot with fresh soil. Water in and leave to settle in a sheltered area for at least 6 weeks before applying fertilizer. Siting it on a bright window sill for this time probably wouldnt be a bad idea, thereby avoiding any late spring frosts and cold winter winds.

Warmest regards,

Aaron