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Pinus thunbergii - Japanese Black Pine

Pinus thunbergii (Japanese Black Pine) seeds


This splendid pine tree is a very popular Bonsai subject. It also makes an excellent tree for coastal and windy gardens as it has good windbreak properties and tolerates sea spray well. Conical when young, becoming rounded with age, the dark grey-green foliage appears blackish from a distance, and the buds are very distinctive being covered with a silky cobweb of white hairs.

Hardy Tree
Height: to 10m
Position: Sun

Packet of 10 seeds



Sowing Instructions: Sow at any time of the year. Mix equal parts of good quality seed compost, eg. John Innes, with vermiculite, perlite or horticultural grit and water until just moist. Sow seeds very thinly on the surface, then just cover them with a layer of vermiculite, perlite or grit. Seal inside a polythene bag and place in the fridge for 6 weeks, checking them weekly to ensure the compost is still moist. [ If sowing a large quantity, mix seeds with the compost/vermiculite and place in a resealable bag in the fridge, then sow into trays or directly outdoors in a nursery bed.] After this, move to a propagator or other warm place and maintain an optimum temperature of 13-15C. Germination should take place in 1-2 months. 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.

An alternative method is to sow in pots as above during late summer to early winter then place in a cold frame and let nature take its course as the seasons change with the seedlings emerging the next spring.

Growing Instructions: Transplant seedlings when large enough to handle into 7.5cm pots and grow on in a cold frame or nursery bed for a year or two then plant in their final position in a sunny position.

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