Keep it well watered when the summer gets hot and dry. The blocks dry the soil out.

FataMorgana

Very cute! What all did you decide to put in it?

We had a large bed of chives and oregano previously, so I transplanted some of them. We also had a tarragon that was being smothered by the kale and sage it was sandwiched between so I transplanted that... I had garlic chives and basils I started indoors. I then went to my local garden center and went on an herb buying spree. :)

So right now I think I have chives, garlic chives, Greek oregano, Italian oregano, thyme, mother of thyme (thinking that's going to look good once it starts creeping), sweet basil, lemon basil, lavender (in one of the larger squares), sage (in the big square), french tarragon (sharing a corner of the sage's large square... probably will move it once the sage starts to get large), sweet mint and peppermint (in the upper level blocks which don't have dirt in the blocks below).

Still have some red ruben basil and marsalles basil to harden off and add, and probably another sweet basil. Been debating also getting Mexican tarragon.

I also stuck a few Egyptian walking onions that our old neighbor had planted years ago that had spread through the fence to our yard and into the edge of the oregano bed. Not sure how well they'll fit, but I hated to get rid of them.