I have grapevines that I started about seven weeks ago with a root stimulator. I placed them in bags of equal parts vermiculite, sand, and peat moss on heating mats. Some of the vines have rooted beautifully and have been transplanted into pots of soil. Others show no sign of roots, yet they have budded, grown leaves, and even started forming grape clusters. Do I let them sit on the heating mats longer or do I transplant them? Also, for the grapevine starts with grapes forming, do I pinch those off (since the vines are too small) to give more energy for root formation, or do I leave them. I'm very new to all of this. Help! And thanks.