Hi and
Charlton. Wow, it sounds like you're doing really well to me. Rooting cuttings in the summer is a hit-or-miss proposition for me, usually. Some plants will make roots any old time and others just refuse to make roots when the weather is warm and the sun is bright. I figure their hormones are saying 'it's growing season'. As long as you're seeing 'still green' or new growth that's encouraging.
My advice would be to keep doing what you're doing, but on the ones that have not made roots yet, get more cuttings if you can at intervals from now until fall, (or the mama plant dies whichever comes first). Sometimes plants under drought stress will also make seeds a bit early so keep an eye out for seed pods, too. Some plants will root from woody cuttings of older stems, but some also need the cuttings to be new growth (green stems, fresh leaves) so that also may be a factor.
You might want to try rooting a cutting in water, or maybe in potting soil to see if that works better. Everything I grow here is used to having lots of water in the summer, so I root many cuttings in plain water then pot up when they have roots. At my daughter's house in Utah we use 'willow water' for rooting. You make a tea from green twigs of willow trees (she has several) and it is said to have rooting hormones. Here in FL I use Quick Start on all my cuttings and transplants.
