Jacque - I just wait until the roots are an inch or two long and then plant them. I haven't seen any issues when planting these cuttings. I just keep them in a shady spot for a week or two before moving to their permanent location. I have a higher success rate with this machine than any other method. Certain plants like butterfly bushes don't do well in it, but most of the ones I've tried worked. Cuphea and Elderberry are about 100% success in it. Hibiscus work every time too. Sorry it took so long to reply. I missed this for some reason!