Seeds should be sown in trays using a sowing medium consisting of loam, composted milled pine bark and coarse river or industrial sand in the proportion of 1:2:2. The pH of the mixture should be about pH 5 to 5.5 for most species (not the limestone species).
Seeds of most species will not germinate without prior treatment with smoke. Either sow the seeds and then treat them with smoke derived from burning plant material, or pre-treat the seeds by soaking them in “Kirstenbosch Smoke-Plus” seed primer for 24 hours prior to sowing.
Normally restio seeds germinate in autumn and early winter. They require day temperatures of between 20 and 25°C and night temperatures of 8-10°C. They MUST HAVE this temperature fluctuation between day and night – they will not germinate if exposed to a constant temperature.
Seed trays housed in an open shade house in the autumn are normally exposed to the correct temperature fluctuations, but they need to be protected from heavy rain.
Treat the seeds with smoke.
Sow them in a tray containing the correct soil mix.
Cover the seeds with a thin layer of milled bark.
Place the tray in a shady place exposed to day and night fluctuating temperatures.
Keep the seeds moist until they germinate (4 – 6 weeks).
Prick the seedlings out when small into individual containers