Yup. they're pretty, but very, very invasive in some areas.

Citrus Leafminer. The damage is done, but you can treat now to prevent further damage. Bayer Advanced Fruit & Vegetable Insect Control (Imidacloprid) can tree this systemically, but you really do need to apply about 2 weeks before you see CLM in your area. You don't mention where you're from in your "Zone" section, but here for me, in S. California, I need to apply in June, at least by mid-June, to give the product enough time to travel from the roots to the newest growth (which is what CLM likes to leave it's eggs under, so that the larvae can hatch and easily tunnel into the tender leaves). I only need to treat once a year, those in other areas of the county need to treat twice, once right before first flush in early spring, and then again, in June/July. Or, you can spray with a combination of Spinosad and a hort oil (like Neem or Volck), starting about a week or so before CLM hits your area, and continue to spray every 3 weeks through the season (again, not sure what that is for you, for me, through October.) Just don't use a hort oil if temps threaten to go above 85 degrees, or you'll fry your leaves. Also, be sure to spray in the evening, after the bees have gone back the their hives, and try to avoid blossoms if you can. Patty S. Here is a link that might be useful: UC IPM: Citrus Leafminer

"subgenus" may be more appropriate (or maybe not, taxonomists have put both sweet and sour cherries into the subgenus Cerasus). All these different cherry species are very closely related, if one wants to consider them different species. This is one example where the line separating different species is not a clear one. It could even be possible to consider the different cherry families as subspecies. After all, if they can freely interbreed and hybridize with each other, can they not be considered members within the same species? (by this definition we could divide all cherries into only 2 groups: those with 16 chromosomes and those with 32) Or one could attempt to divide cherries into different families: Sweet cherries (P. avium), sour cherries, Black cherries plus Capulin native to the American continent (put into same group), and Asian flowering cherries. Perhaps better classification could be provided if taxonomists utilized multiple degrees of species relatedness/separation, because it is ambiguous whether some of the different cherries should be classified as entirely separate species or subspecies within a singular species, neither of which would be wholly accurate.

KJM Not the root cuttings - cutting of the healthy parts of stems that will root. Very easy to do, and you may end up with more plants. Cut off healthy parts, let them callus (heal) for a bit, then stick into well draining mix (easy to do in pot). Keep in partial shade for a while, and do not water at the beginning - roots should start growing quiet fast in nice weather. Sandy soil over the clay isn't that good...I know, have similar. Definitely not good for succulents. Either build up the raised bed much higher using lots of grit, or perhaps better, plant succulents in containers that can stay outdoors year round. I have most of mine in containers. They need drainage holes and fast draining mix. I think there is still time to replant -but don't know your zone/general location (best to add next to your name :)