Posted: 05/06/2016 at 13:02
Just enough so that they don't completely dry out. Mine are in full sun so I give them a drink every two to three days now and then when it gets hot I try to water them most evenings.
When they do flower remember to dead head the flowers once the petals have come off. Do this a lot as this will get them to keep flowering throughout the summer.
Good luck with them. So pretty and well worth growing.