Feeding Azaleas And Spring Plants

Things have really started moving, outside, and now is a good time to feed acid-loving plants such as azaleas, rhododendrons, camellias. All other spring plants, including bulbs such as daffodils, can also be fed now.

WHAT FEED IS BEST?
I used to find blood and bone meal, given at about 35g per sq metre (1oz per sq yd), wonderful for spring plants, especially azaleas. But of late, I have been using a liquid ericaceous (lime-free) feed. The results do not seem quite as good, but still effective on all spring plants, including 'forest flames' and conifers.

The idea is to give a bit of nitrogen but not too much: We want flowers, not excess growth. A general purpose balanced feed (e.g. 7-7-7 (liquid growmore))can be used on most plants, but not lime-hating ones (although I can't see why it should make any difference: liquid feed shouldn't contain much lime, if any).