I'm getting my house ready to sell. Because of building work there are a lot of bare patches of soil in the garden. I'd like to put some colourful plants (ideally flowering) in to make it look attractive to buyers.
Can anyone recommend flowering plants that can be put in now (September) and give colour through until say the end of October in Oxfordshire on clay soil? I've missed the boat for many of the usual recommendations (e.g. Autumn crocuses). Something bright and easy like Petunias would be ideal.