Except for the Euphorbia (plant in the background in 3rd photo), your plants will all appreciate being damp. Not wet, damp. That means when you stick your finger in the soil, when its dry an inch down, water. Don't let the pots sit in water. Pick the pots up and feel their weight. After you water, do it again. They should weigh quite a bit more. If you are deciding when to water, pick up the pot and see how much it weighs.
You can also check for moisture at the bottom of pot by pushing a bamboo skewer into the soil to the bottom of the pot. Leave it for a minute and pull it out. How does it feel (wet, damp, dry).
