Apply organic fertiliser.
Sprinkle organic fertiliser like seaweed extract or blood, fish and bone around your plants.
They will slowly release their nutrients giving your plants the best possible start as they start to grow in spring.
Plant raspberry canes.
Buy in bundles and plant in a trench with plenty of organic matter.
Summer fruiting varieties will need support for their fruiting canes. Use straining wire attached to posts for the best support.