Flower Care Help Thread

Hi All,

I'm new to gardening altogether, and have recently taken on the flower garden at the front of our house. We've chosen to plant perenials & so far have put in some pink & red pentas. These plants say that they require little water   once established. I've been watering them once a day for the past several days. Only 2 days later, some of these plants are wilting already. Now, I'm in east Texas & we're having very warm dry weather lately. I've planted them using a 2:1 mixture of existing dirt with peat moss. Any thoughts from you plant gurus? Am I watering too much? Not enough? How do I know when they are established? Is the soil mixture right? Any & all help is appreciated.......