Cuttings: Salvia divinorum propagates naturally and easily by rooting from
will root in plain tap water (without the need for rooting
hormone powders or the like) normally within two or three weeks.
time to do this is probably in the spring with the daylight
extending, but in practice you may tend to do it more in
the autumn, when mature plants should be cut back anyway and it
would otherwise mean not utilising the cuttings. You can take
cuttings whenever you like though, and I generally recommend getting as many
going as soon as you can, especially for the insurance of having more than one
plant. The growth rate
is dependent on the temperature and the amount of light, for example, a cutting
taken in mid-winter should still work but could take 4-6 weeks to root rather than 2-3
weeks. Artificial light can be used in the winter, see the section on
Use a clean sharp knife to take a cutting ideally about 20-30cm in length
(but anything above 10cm will probably be okay). You'll notice that the stem has distinct sections. Since the
remaining stem on the live plant will die back to the next section, it's a good idea to take cuttings near to a join
between two sections (to minimise such wastage), that is, from about 2cm above an intersection.
It's best to take cuttings of a reasonable size. Good thick stems means
more biomass and ensures a reserve for the plant to draw upon while setting
it's roots so improving the chances of getting quickly established vigorous
plants. However, younger shoots can be used too, and if you are trimming the plant
or 'pinching' it, you may as well have a go with whatever cuttings you
The cuttings will not be able to sustain too many leaves so remove
those nearer the bottom of the stem, leaving no more than half a dozen or so of
the much smaller top leaves [...]
cuttings in separate containers will isolate good from bad (in
case one fails and starts to rot) and improve the over all
chances of success.
Simply leave them in their containers (I use glass jars) near a window but
avoiding direct sunlight. Make sure that there is enough water in the container,
about 6-10cm depth of water for an average length cutting.
Cuttings are ready for potting when you have a good few roots 2 - 4 cm long.
Cutting plants back: Plants should be cut back
in the autumn. Their growth rate will slow in the winter and if you don't
do this then they may not be able to sustain themselves. I've had one
large plant die after not being cut back (admittedly it was also in a
particularly shady corner).
However, as suggested elsewhere, if you are
relating these notes to your own circumstances, which may be different, then this may be less of a factor.
Here in Scotland, the winter nights are about twice
as long as the days (- and the days can be pretty dark too!). Also,
remember that plants can grow under artificial light, check out the section on
lighting back from here.