I was watching a gardening programme and even the experts say plants we buy at some garden centers are too forced so do not do too well. I used to buy plants from a local shop and he grew stuff himself, the plants were never looked after well but as soon as they were planted they would race up!!!! I bought a plant once and by the end of the season had to cut it back...it was a Mallow plant, I will try and remember the name, anyway, plants that are from other people are much more hardy than buying the ones nice and green and fresh looking from a mash producer of plants, I prefer the independent garden centers but love looking at any of them!