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Hormone rooting powder - sell by date??
Mike,
you raise some good points here. The main advantage of rooting powder is the fungicide, IMO I was told there were a couple of reasons for failure beyond what you have mentioned. Too much powder forms a cap which affects air and moisture reaching the root zone, which then affects the roots abbility to break though the talc cap. This is one of the reasons I have moved over too gel. I take you point about other factors being major players, humidity, moisture etc, but they are out of control for most amateurs (how many of us can accurately control temperature - many domestic electric propogators have fixed thermostats - my Scotts heats the soil to 24°C, which explained my poor performance) |
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