McGoo said:In summer, usually once a day, or more if they wilt, which can be up to three times per day. Dont know about winter yet, havent had one! Seedlings, though, can be once every two weeks, depending on where they are.
Are they actually wilting from lack of water, or are they transpiring faster then they can bring up water from the roots? A lot of plants will droop in very hot weather, it's how they slow evaporation and prevent water lose; but they perk right back up in the evening.
If I'm telling you something you already know, you may smack me for being too pontiferous.