Not a gardener, but lucky to have large beautiful garden with lots of established flowers and shrubs ( previous owner had a nursery). I would like to fill the patio tubs with easy to grow bright, colourful flowers. However I am on a very tight budget. I am looking for recommendations for cheap/ quick to grow flowers. Where is best place to buy? Local garden centres are lovely but way too pricey . Have tried growing from seed with limited success as Ithink I left it too late and not grown much in the month I sowed them. Advice appreciated.