Cotoneaster horizontalis seeds
Winner of the RHS Award of Garden Merit.
Height: 50- 200cm if trained upwards, Spread: 180cm
Position: Semi-shade in any soil
Packet of 30 seeds
These seeds have a double dormancy which needs to be broken before they will germinate, ie. they need to go through a process which simulates the changing seasons.
Sowing Instructions: Sow at any time of the year very thinly in trays or pots on the surface of moist, peat based seed compost (eg. Levington), and seal inside a polythene bag. Maintain an optimum temperature of 18-21C for 8 weeks, then place the container(s) in the fridge for a further 8 weeks. Then, return to 18-21C and germination should take place. Throughout this process check regularly and ensure the compost does not dry out. Note: Germination can be very erratic, so sow thinly and prick out the seedlings as they become large enough to handle disturbing the rest of the compost as little as possible.
Alternatively, sow as above, seal in a polythene bag and place in a cold frame or sheltered part of the garden and let nature take its course as the seasons change. (I personally find this gives the best results)
Growing Instructions: Transplant seedlings when large enough to handle into 7.5cm pots. Grow on at a lower temperature (10-15C) and acclimatise to outdoor conditions in spring after which the seedlings can be grown on outdoors. Plant in final position in sun or semi-shade in any soil.