I've found no shortage of information about the amount of space to leave between a climber and its support/wall/fence etc., but little about how to space climbers from one another. I'm planting along two 12m fences, so lots to cover!
As a rule of thumb, should I look at the maximum spread of a plant and leave that much space between it and the next plant? For example, if the maximum spread of a climber is 3m, should I leave 1.5m either side of the plant, or can I plant them closer together than that?
At the moment I plan to plant a selection of clematis, akebia, honeysuckle, choosing specific ones to match the conditions (one of the fences faces north, the other south).
Thank you. Sorry if this is a stupid question but I am a rank amateur where gardening is concerened....