I have 2 small weeping cherrys in a courtyard area in slightly raised beds.I heavily underplanted the area with lots of spring /early summer bulbs in layers but I have just realised that i havn't left sufficient room for summer flowers.What is the best option?.Planting with seeds that i can sprinkle over?.i have packets of poundlands blue flower mixture or just cornflower seeds.Or is it best to remove some of the bulbs?If i do this i will have room to plant delphiniums or something similar.Has anyone got any advice and can help me with any recommendations?