Posted: 13/03/2014 at 18:48
Good drainage is many things to many gardeners. A pot should dry out at much the same rate as a flower bed would. A 5 cns layer of gravel covered by porous landscape fabric would be good for a long term Acer pot. The growing medium should be beefed up with some topsoil and well-rotted compost. Whichever Acer you decide on the most important seasonal task is to gently scrape away the top 5 cms of soil each Spring and replace with fresh soil compost mix, plus some pelleted chicken manure or similar. I have an Acer atropurpureum var. dissectum which has been 18 years in the same pot.It is 4' high, 4' wide and seems happy to grow slowly with fine foliage every year.