Hi! I had some white spots on the bottom of a few leaves on my succulents awhile ago. My white spots were waxy, and I believe they were scale or mealybugs. I don't know if that's the case with some of your succulents but I treated it by diluting some rubbing alcohol with water and spot treating it with a q-tip. I also rubbed some cooking oil (like canola or olive)on a severe infection of one plant to smother the little buggers. Some infected leaves did dry up and fall off, others just healed but the plant has remains healthy, I hope this helps and good luck with your beautiful plants!

Ken, I know the roots will be cooler under the rock, and fig cuttings root slower in cooler soil, but they don't mold or dry out. The boulders are here on site, and we just found some that didn't continue under ground (many do) so we could dig a slanted tunnel under the boulder with the tip of the cutting under an inch of soil next to the boulder, and the bottom of the cutting securely under the rock. IF the cuttings root and grow, the boulder will protect the baby tree from cold winds and will keep the temps warmer during the night. Figs LOVE heat! I root cuttings all the time in shallow trenches outside. But they have to be moved to a container till they get bigger, so the experiment is to let them root and grow in their final place from day one. Why so many figs? I started with one and found out there are some amazing varieties that taste like raspberry and strawberry jam. Some drip honey and are just juicy and delicious. Couldn't stop with just one tree........ Here is your documentation. A picture is worth a thousand words. This shot was taken this month about a week ago. See the little white stick at the bottom of the boulder? That is a plastic fork with the name of the fig written in permenant ink marking the spot where I expect to see a fig leaf popping out. As soon as a leaf emerges, I'll surround that baby with chicken wire to protect it from the many critters out there. There are other boulders with different cuttings, but you get the idea.

To make sure it is scale, try to wipe them off with a cotton ball/q-tip moistened with rubbing alcohol (or even a tissue). Scale would come off easily, with just little pressure. If squished, there would be red 'goo' - blood. Otherwise it is not scale. In last photo, the tips are white (not brown). Could be just drying of the leave or it may be mealies. Is there any fluff? cottony-looking very fine webbing? See if it could be wiped off. Are they all potted in communal pot? Some have different watering needs. Btw, 6feet away from window is typically not enough light for most succulents. Rina

I'm pretty sure that it's thrip damage, thrip frass, and thrips flitting out at you.