Thiessen is one of the most popular Saskatoon or Juneberry varieties, with a particularly good sharp tangy flavour.
The tree is vigorous and the berry-like fruits are amongst the largest of their kind, and ripen early in the summer.
The fruits ripen over a period.
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Delivery period: Pot-grown trees can be delivered from September onwards. Bare-root trees can be delivered from mid-November onwards. Within those periods you can specify your preferred month of delivery during the checkout process. It is best to order as soon as you can to ensure items are reserved for you.
*Mature size: Height shown is the approximate height of the tree when mature (after 5-10 years), not the height when supplied. See photos of trees as supplied. Actual mature heights may vary considerably dependent on your local conditions and training and pruning regime.
Stock availability: Items showing as 'sold out' will probably be available again next season.
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Thiessen is self-fertile and does not need a pollination partner, although fruiting may be improved if there is a compatible tree of a different variety nearby.
Important: advice about pollination
Thiessen is an early-flowering Saskatoon, and like all Saskatoons is very susceptible to frost damage, so best planted in a sheltered frost-free area.
Thiessen grows with a more spreading habit than other Saskatoons, and if planting several bushes, allow up to 3m between each one.They should reach a mature height of about 2m-3m or so in the UK - in Canada Thiessen reaches 4m-5m. After a few years it becomes a large sprawling bush.
Do not add fertiliser at the time of planting, but water well, and keep the young bush regularly watered (but not drowing) during the spring. Water should be applied to the base of the stem and the root area, try to avoid letting water splash on to the leaves. Keep weeds and grass well away from the base of the plant.
No pruning is usually required for the first 5 years. After that, prune out some of the older branches each spring, since fruiting is best on younger shoots.
Thiessen was discovered as a wild seedling in Sasketchewan, Canada, in 1906, making it one of the oldest Saskatoon varieties. It is known to grow productively for more than 50 years. It is now the second most widely-planted Saskatoon variety in Canada.
All our trees are grown in the UK.