Planting suggestion for gap between flagstone
My flagstone deck on the north side of house is about 400+ft2. I have purposely built the gaps over-sized so I can plant between them.
It gets about 5-6 hours of sun (mostly noon-5pm) in the summer and may be an hour or so in the winter.
Currently by sprinkler but have low pressure tubes in close proximity.
For this summer, I tried purple alyssum. Very pretty but took lots of them and they don't seem to spread by runners, so even doing 8" by center, there were gaps. Surprisingly, they took traffic rather well. I understand purple alyssums do not self seed much and they are annual in my zone. I hate having to do it every season.
I am wondering what other plants that I can try? IF possible, I would like to use 1/4" low pressure dripping tubes (emitters every 6" or so)instead of sprinklers to conserve water.
I thought of putting sod in the gaps, but that would require the running of sprinklers.
Thanks for helping.