Growing some spring delights

Flowers are fattening up, although the trees are pathetically small :( My unknown tree wants to be a bush. Have defoliated and then a day later, bush again, so just letting it do its thing. Fortunately the flowers are all up the top and none really covered by leaves, so guess nature knows best. The Super Kush is looking healthy and flowers looking bigger each day. I reckon it's a couple of weeks away from harvest, but will see at the end of the week. I was spraying with Vita Race but noticed the pistils looking brown, too early I thought, maybe affected by the spray? So haven't sprayed since and their seems to be less browning...