Basic cutting question--how damp?

Chris StrombergerApril 29, 2008

New to propagating cuttings. Trying bougainvillea. Very small scale. The setup I have is basically a large tupperware container with some small peat pots inside with one cutting in each pot. Basic question is, how damp to keep things? Should I leave the lid on almost all the time, so that it's very humid in there, or will that bring mold/fungus? The other option to me is to remove the lid daily, and mist with a spray gun to keep the cuttings from drying out, and then replace the lid overnight, while at work, etc.

Any basic tips appreciated!



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ccroulet(z9 CA Sunset 18)

I'm learning about this myself, propagating native Calif. salvias. Here's what's worked so far.

My medium is perlite & vermiculite, mixed 1:1. I put it all in a plastic tray, the kind you germinate seeds in. The mix is wetted to feel damp, but not so wet as to leave any standing pool of water at the bottom of the tray. I've made that mistake ("Let's just add a little more water...") and had to discard a tray-full of mix. I use a dome to maintain humidity, but I also mist the plants from a spray bottle once or twice a day, as I remember to do it. Being without roots, they are at risk of wilting, which can happen quickly. My climate is dry most of the time, so YMMV. I'm using rooting hormone. I was using the Schultz stuff that Home Depot carries, but now I'm using Dip 'n' Grow, which seems to be more effective (but I haven't done a controlled test). My latest batch of Salvia clevelandii cuttings rooted in less than 13 days. That is, at the 13 day mark I checked them (scooped them out of the medium, one by one), and most had substantial roots (19 out of 24 cuttings), and the others may yet develop roots. My experience (admittedly brief) is that once you get over the hump of getting them to grow any roots at all, the roots grow very quickly. You can go from one little 1/2" root to a full "beard" of them in five days. I also use a propagation heating mat, but with warmer weather now, I could probably just unplug it. I have a lab type thermometer stuck in the propagation mix to monitor the temperature. The temp varies, but I try to keep it around 75F.

    Bookmark   April 29, 2008 at 11:28PM
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