Just thought I'd add my 'two bobs worth' on cuttings. I grow mainly Zonal
I don't use any hormone powders and don't have any trouble striking
cuttings. The worst that can happen here is stem rot through over watering.
I use a good quality potting mix, have recently been using one with the
slow release fertilizer in. I have tried various things including
additions vermiculite, perlite, river sand etc, but my cuttings seem to do
better with some nourishment. I expect roots to be formed in 3-4 weeks and
turn the plants out to have a look at this stage. If they are damp no
damage will be done.
The cuttings are usually about 4" long and cut immediately below a node
(some people say to cut through the node)
In the hot humid weather we are having now I dust the cutting with sulphur
before planting (without delay) into 3' or 4" pots.
If I misted several times a day they would die of stem rot for sure. I
have to be careful not to wet the leaves and only water twice a week even
in the hottest weather.
With this method I would say I have a 95% strike rate
I guess different approaches are needed for different areas .... just a
matter of trial and error.
Joan (in hot and huimid Perth W.Aust)
Joan Steele, Lesmurdie, Western Australia