Hi Susan,

if you stick your finger in the soil, do they still feel dry? sometimes, when peat dries out, you have to soak it for a while (15 mins or so, entire pot in the water) for it to take water up again.
As for a schedule, no such thing really. it depends on your potting mix, temperatures, size of plant, humidity, etc etc etc. - i have some standing next to one another, same everything except plant, watered just yesterday, and now one is dry the other isn't...

start with checking your plants regularly, then after a while you get a feel for how often you need to check and water them....

Karin