Help! Dark spots on my Echeveria

Because you live in a very warm and humid climate, you will need to water very, very sparingly. Echeverias come from areas of low humidity, and you have high humidity. Because of your high humidity, they won't need much water. Make sure your plants are in a very free-draining gritty mix, and be very careful about watering them. When you do, keep water off the foliage. The plant can grow out of the spotted foliage eventually.

Believe it or not , excessive sun exposure can also cause these dry spots. I'd remove them from the window sill and maybe put them on a table near the window . The glass is probably magnifying the sun's effects to certain extent and well...too much of a good thing .

Don't know if your plants have the same reaction as my violets do, but be careful when watering. Any droplets of water left on the leaves will cause black spots.

It can be a number of things, water sparsely, check the roots and if the are dark you are over watering. Also it might be time for a bigger pot.

All these ideas are good and put together, will make for a healthy plant.

I have my succulents outside and it rains almost everyday. The key is well drained soil. I put a layer of pebble rocks and mix cactus potting soil with warm castings. Make sure your pots have holes and they are happy.

worm castings. Lol

Repot the ones in the plastic nursery pots. They do not breathe, and not meant for permanent potting. :)

Sphagnum Moss under the soil not only keeps the roots dry, it can help when I'm busy and forget to water.. When any of my plants have black spot I give them some milk. They LOVE milk as it provides calcium. Black spot can be a sign a plant has calcium deficiency. They also love tea.. Your left over tea, or tea leaves.. used tea leaves are best.. 🙂

Overwatering

try repotting it and put small pea gravel or medium sized gravel in the bottom for good drainage! :)