I think it is the slugs biting on the leaves. If not slugs, then another pest. Munch, munch, munch...as they move along.

We had a really severe drought, no rain from July 1st and still none here into October.
I have only watered about 3 times during this period.
J. heuffelii 'Elmo's Fire' seems to have come through in great shape.

Does look good Lynn. All my semps definitely had a stressful summer, but are enjoying the cooler weather now.

The weather is finally getting into cooler day time temps (low to mid 70's) and into the 40's at night. The plants are very happy. Still no rain since Some time the end of June.
We might get some rain the end of this coming week. Keeping my fingers crossed.

Jovibarba heuffelii 'Tan'

That's a beauty Sandi. Did you just get it?

No. I've had it about a year or so. The yellow and green heuffs take longer to recover from the Colorado winters. So they tend to look smaller than the brown or red heuffs.

It is lovely.

Right now my Apache is huge. I love the way it's leaves become long and slender when the sun and heat arrive.

I'll say that's huge. Another beautiful picture of your gardens Lynn. They really should be in a magazine!

Thank you Chris. But do you see all the cottonwood tree fluff clinging to the fuzzy leafed semps.
It was really bad, at one point it almost covered the semps, but a nice stiff breeze that lasted for two days, cleared most of it out.

Now that you mention it, I do see the cottonwood fluff. We get that too, but in the fall we get thistle seed from the field across the road from us and that covers the plants too. Only problem with that is I have to get it all out or it will make thistles. That's a real nightmare.

I remember you photos of the flying thistle seeds. That was terrible. At least the cottonwood fluff doesn't make trees.