Echeverias don't do well in cold temperatures. They are desert succulents and do best in the heat and in dry environments. Keeping them in average household temperatures will be fine.

When it comes to watering, they don't need much water. Give them water when the soil is fully dry. You may see that they start to become wrinkled when they need water. They'll need to be watered more often when it's hot.

Be cautious not to overwater them because root rot can occur, so it's safer to underwater them. You should also be careful and not allow the water to sit in the rosettes since this can lead to rotting.