Greetings, all: I have a planting query for bulbs on rock walls in a wet zone 8 climate (PNW coast, wet winters, dry summers). Dwarf iris, yes, also Pacific Coast Iris, crocus if I can devise rodent-proof caging, tulips ditto, small daffodils. The base is fine sand, which I am amending with rock grit, and several carbons, and mulching with gravel. Some walls are sunny (near full to half days), one wall is almost completely in the shade (ferns will go here). Please let me know your suggestions. Thanks ahead of time for all information. Kathleen