I have red and black patio slabs in my garden and they have faded to a very dirty colour even though they are well looked after . any suggestions on how to get the colour back ie paint ? also i have a wisteria 4 years and still no flowers.
Paints and sealants give a temporary effect but eventually fade or flake off themselves.
Wisteria can take several years to flower if growing well. Shorten unwanted whippy stems back to pencil-length in July.