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misting or chamber?

Posted by earthnut WA/usda8/ahs2 (My Page) on
Fri, Aug 31, 07 at 2:26

I am propagating aspen-poplar hybrids in a greenhouse. They are not nearly as easy to propagate as wild poplars.

I am currently using large ziploc bags to contain pots of cuttings. I take softwood tip cuttings, strip off the lower leaf or two, dip in powdered rootone, stick them in moist potting soil, spray with fungicide, and put them in bags. I leave the bags for two weeks, no openings, and most of them root.

I wean the plants to room conditions by transplanting them up a pot size and slowing cutting away at the plastic bag until it's gone. From cutting to mature plant, I get 50% or less survival.

I've gotten lots of lovely plants this way, but I'm trying to think how I might get better success. Might misting give me better rooting? Whould misting make it easier for the plants to make the transition to normal room conditions? I'd like to get an idea of how the two systems compare before I invest in the equipment. Thanks!

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RE: misting or chamber?

  • Posted by jbclem z9b Topanga, Ca (My Page) on
    Fri, Aug 31, 07 at 3:53

Hi earthnut, can you tell me how many cuttings you put in each ziploc bag...just one or a bunch. I've been using ziploc bags over individual containers and I don't think the moisture lasts more than a week in these...and I've had miserable luck with bougainvillea, trumpet vine, and now trying guava. I've been misting manually inside the bags sometimes every 3-4 days, except not in the trumpet vine ones.


RE: misting or chamber?

Just a FWIW comment: I did experiments on poplar-[something] hybrids for several years (My hobby was propagation experiments for several decades.)

I always had best results taking the cuttings in mid-winter, December or January, and rooting them first in the dark, then proceeding to budding and leafing in pots, ziplocks or whatever.

Indeed many plant that had annual cycles seemed to start better this way whereas tropical houseplants rarely seemed to benefit from rooting in the winter.

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