I plan on making 2 splits per hive in late March - early April (original colony should have about 6 frames of brood and 20 frames of bees, divide that by 3). So they will be 4-6 frames strong (assuming bees return to their old colony). They will have capped & uncapped brood and I will give them a laying queen (which should begin to lay within days, after she is released).
Depending on how much they grow I plan on making the same type of splits in late June - early July.
Would this be at all effective to control varroa mites for a while? I sort of did this last year and didn't feel the mites until October-November-December, in the spring and summer they were very active and healthy-looking.