HOW TO INCREASE ACIDITY IN SOIL?

Mine were planted directly into the soil, which is also sandy, but if you use large pots sunk into the soil yours won't be significantly worse off than mine are - the pots will certainly not dry out as quickly as they would out in the open.

They do need to be kept moist though, and I make sure I don't forget about them altogether during dry spells, but I don't really water them a lot more than anything else, although I do use rainwater on them, and also a mulch to conserve moisture (nothing fancy, just used MP compost.)

thanks for the replies.

think i'll try drilling 10 holes but not put the grit in to try and keep them moist enough, i'm thinking the sandy soil will keep the drainage good enough.

i'll also be using mulch to keep moisture in and act as a slow release pep up for them.

i'll update with a new post when i get results (good or poor).