Last year I believe it was in July i chip budded apricots, peaches, apples...almost everything took and I've seen some really good growth. You want to keep that bud dormant until next spring. I plan on doing the same thing for this year... I have a ton of budding to do because I want to make some multi variety trees with a bunch of peach seedlings (plum/peach/apricot)...see what takes and what doesn't. I wish i could throw my sweet cherries on them too.