I use 1/2 and 1/2 peat moss and perlite and have had almost 100% success with cuttings, although I've never done grapes. I use a misting system that keeps the cuttings and the medium quite wet. I think the success I've had is because the medium drains very freely. And I don't cover the top of the cuttings, just have a tent around the sides - made from old white shower curtains, actually, so that the sun is partially blocked. I'd suggest that you lighten up your soil mix with more perlite and open your domes as much as possible. Good luck!

Try to make sure that the soil is not sopping wet when you insert the cuttings.

I think my mixture is too wet and the inside moisture is also too wet. Next time, I'll correct this. This is my intention to try batches and improve the process.... Thx.

I propagate Muscadine Vines, about 2-3K per year and get about a 90% success rate. I have a mist system and my growing media is 4 parts Perlite to 1 part peat moss. My misters only go for 5 sec. and off 10 min. from about 9 am until 4 pm. The cutting never get water logged.

RedSun, if you used 100% perlite with your same set-up, you'd probably achieve great success. Rinse the perlite thoroughly first.

I use less perlite in my mix every year. Maybe next year I will go straight perlite.

Thanks,

Hans