Rambling roses are a beautiful addition to any garden or landscape, but only flower once during season. It is necessary to prune them right when they are done flowering at this time, in order to make space for new shoots that will grow up from the base of the rose bush. Rambling roses are best pruned from early June to August.
Wear the gardening gloves to protect from any thorny areas of the rose bush and to make sure your skin doesn't get scratched. Make sure your pruning equipment is sharp and clean.
Locate the dead, diseased or broken canes (otherwise known as trunks), and trim them with the pruning scissors or shears (scissors for canes less then 1 1/2 inches thick, and the shears for canes that are larger) to the base of the rambling rose bush first.
Cut back the flowered stems of rambling rose to the base of the bush, at the ground. Next, thin out overly crowded areas or canes that are criss-crossing and are growing out awkwardly. Prune out every other cane on the rambling rose bush in crowded areas.
Train the rambling rose shoots by cutting through last year's plant ties that supported the shoots, and re-tying them with new shoots. Secure them in higher places for new growth, to the trellis or other parts of the rambling rose bush.