Ponderosa Pine, Bull Pine, Blackjack Pine (pinus ponderosa)
1 gram (approx 22 seeds) £1.35
2 grams (approx 44 seeds) £1.80
5 grams (approx 110 seeds) £2.75
10 grams (approx 220 seeds) £4.50
25 grams (approx 550 seeds) £9.75
50 grams (approx 1100 seeds) £18.00
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Mature trees have cinnamon-red bark with black crevices. Younger trees have black to reddish-brown bark. The tree can often be identified by its characteristic long needles that grow in tufts of two or three. It is a hardy species adapted to dry mountain environments. It thrives in light well-drained sandy or gravelly loam soils and is intolerant of poorly drained soils. Needs an open, sunny position to succeed and will not grow in shade.
It is fast growing during its youth and is long lived, usually between 300-600 years in the wild. It is adapted to survive brief wildfires and is drought tolerant. It is also very wind-firm but not suitable for coastal planting.
Germination, Sowing and After Care Information for
Ponderosa Pine (pinus ponderosa)
The pre-treatment is done as follows.
Soak the seeds in water for 24 hours. Fully drain away all of the water and place the seeds in a zip-lock freezer bag. Place the seeds in the fridge, it is important that during this period that the seeds do not dry out or are waterlogged otherwise the pre-treatment will be ineffective.
It is important to keep checking the seeds every week or so to make sure that they are not drying out. You could also at the start of treatment incorporate a little damp vermiculite or perlite, this helps to keep the seeds moist but not waterlogged.
After around 8 weeks under these conditions the seeds are ready to be sown.
Seeds should be sown into containers filled with a good quality general potting compost. Suitable containers could be plant pots, seed trays or plug trays or even improvised containers with drainage holes. Firm the compost gently and sow the seeds on the surface. If you are sowing in plug trays, sow 1 or 2 seeds per cell.
Cover the seeds with a couple of millimeters of vermiculite or failing that a fine layer of sieved compost. Follow with a gentle watering and keep them at room temperature. Germination will begin within a 10-14 days of sowing.
The seedlings are reasonably robust and trouble free and usually grow to a height of between 3 and 10 cm in the first growing season depending on the sowing date and cultural techniques.
Developing seedlings should be fine in full sun, keep them well watered and free of competing weeds.
Growth will accelerate in the second and subsequent years and the developing young trees should be re-potted as necessary preferably during the dormant season. After perhaps 2 or 3 years they are ready to be planted in their permanent position
This species will grow very large, very rapidly so plant it well away from buildings, power lines, etc.