David, because there is actually little resistance to pulling them out of the perlite, whether rooted or not, that's all I do. I bundle 4-6 cuttings (tied together with twist-ties), so I simply pull the whole bundle up and out to take a look. When I have all the bundles removed from a 5 gal. bucket I will scoop out a gal or two of the perlite, stick the bundles back into the pot, leaning them against the edge of the bucket, and pour the perlite back over their bases (there are usually 2-3 bundles per bucket, depending on the thickness/length of the cuttings). If there is rooting of any cuttings, I will remove it/them for potting. I don't use any soil whatsoever until I see rooting and then those cutting(s) will go in a well-draining mix in a 1 gal. pot. I will keep those newly potted plumeria in the Everything Else greenhouse for a week or so (that's where they are in their buckets of perlite) and then begin to acclimate it/them to full sun. I keep the potting media slightly moist at all times.
Everyone has their own way of doing this, but this method seems to work well for me.
