[QUOTE 5141286, member: 9609"]Any rockery experts ?
I'm building myself a big rockery and just wondered how much space should I be leaving between the boulders ?
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It depends what you want to grow. If you want some rosette forming alpines like saxifrage and Lewisia you need to wedge them in between rocks so the rosette is vertical- the water will drain off and the rosette won't rot. Incorporate grit into the planting hole.
Things like saponaria (tumbling ted) phlox and aubretia will trail down the rocks.
Some dwarf Daphne might be nice. Other evergreens would be true dwarf conifers, but be very selective as they can smother the whole lot.
Trees- look up things like Salix boydii and Betula trosts dwarf.
A sunny and well drained area will allow you to grow Rhodohypoxis (my favourite)
Things like alpine primula and alpine auricula will do well.
There are lots of choice dwarf bulbs you could plant.
I think your gaps look fine.