I'm waiting for them to come in too and rather than go to the shops all the time I'm checking every day on their websites. As soon as anything good shows up I'll put a posting in Chatter and let everyone know what's available and when. If you're interested Aldi have the fruit trees (in boxes) in next Thursday (23rd February) but nothing else for the garden. Lidl have no garden stuff at all as yet.
If you want to check yourself the links are
Aldi have new offers every Thursday but Lidl have them twice a week (Monday and Thursday I think).
I've tried the Netto site but it's rubbish and just puts up a pdf of their leaflet which is very difficult to read.