Every year I put 4 or 5 trailing petunias in Miracle Grow potting mix in a 9 inch basket and by the end of the year it's all roots. As I switch to more locally accessable 8 inch pots I was gonna go with 3 but am wondering if 2 would actually give me more foliage and blooms due to less crowding.
Also, my petunias are fabulous till after the fourth of July and then they go downhill, starting to brown in the center and spreading outward. By that time of the year I'm watering daily with quarter strength fert every other day. 24 hours later( without rain) the basket is very light. Full, all day sun. Help? Thanks.