A double bloom rose bush is a rose bush that produces more flower petals inside each rose bloom than the standard rose bush. Double blooming rose bushes are grown because of their full and outstanding blooms. Care, pruning and fertilization of a double blooming rose bush is the same as single blooming rose bushes. If planting a bare root double blooming rose bush that has the roots wrapped in plastic, remove all plastic and packing material from the roots and soak the roots in room temperature water for 24 hours before planting.
How to Plant a Double Bloom Rose Bush
Dig a hole that is wide enough for the double blooming rose bush's roots so the roots are not crowded and deep enough that the bush can be planted at the same depth it was planted in the nursery pot or nursery. If planting a bare root plant, plant to a depth just below the graft. The graft is the swollen off-set section at the base of the trunk where the rose variety was grafted onto the root stock. Do not cover the graft of the rose bush because the root stock may sprout instead of the top growth or grafted part of the plant and the rose bush cannot grow properly.
Put a layer of compost one inch deep into the bottom of the planting hole then plant the rose bush in the planting hole. Spread out any roots that are encircling the root base.
Mix the native soil that was removed from the planting hole with compost. The planting mixture should be one-half compost and one-half native soil.
Fill planting hole around the roots of the double blooming rose bush with the mixture of soil and compost. Allow water from the water hose to slowly run into the planting hole while you add soil to the planting hole. This prevents air pockets from forming around the newly planted roots.
Spread a one-inch deep layer of mulch around the base of the rose bush covering the entire root zone. Leave a one-inch gap between the rose bush and the mulch so the rotting mulch cannot spread any mildew of fungal diseases to the rose bush. Add water over the mulch to settle the mulch and soil around the newly planted double blooming rose bush.