Prepare the ground thoroughly. A rose growing in poor-drained soil is susceptible to a lot of trouble. Do not plant your bushes too close. Remember healthy roses require good air circulation. Feed the plants properly.
Potash is vital here, because it builds up disease resistance.
Phosphates promote a healthy root system and nitrogen stimulates the growth of leaves and stems and increases the size of the plant. Plant in the proper place and the proper way. This will reduce the risk of problems due to drought, water logging, frost damage, light deficiency, excessive suckering, etc. Inspect plants regularly. Catch problems early.