Wood Container Drainage
Hello, I am a fairly new gardner from Alaska. I have gardened here in the past but it was years ago. Late last summer I built a new privacy fence(2x4 & cedar) with left over wood on my decking. See pic. I drilled 3 holes for drainage in each run and offset each hole in each tier so they are not directly above each other. My question, do I need more drainage holes in each run or is the 3 holes each enough? I would like to plant Scarlett Runner Beans on the tops tiers to bush it out and some chive, radish, and beet in the lower tiers. Might throw some nastrishums flowers in too. Thank you for your time.