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POPULUS NIGRA BETULIFOLIA – Native Black Poplar
This is the native Black Poplar which in recent years has obtained a cult status in the UK for its rarity value.
It is characterised and distinguished from other poplars by downy fresh shoots, leaves and stalks. The leaves tend to have their tips rather drawn out like a Silver Birch, hence the subspecies name betulifolia (birch-leaved)
It is a very rugged tree which will grow to 25m (80ft) tall with a very broad head, a distinctive leaning trunk, large bosses and deeply fissured bark.
Where to grow
Poplars will grow easily almost anywhere, they have the advantage of growing very big, very fast. Like willows, poplars have very vigorous and invasive root systems. They will tolerate waterlogged and heavy ground but will also grow well in good deep loams. They are not so good in very dry positions.
Truly natural populations of Black Poplar occur on floodplains and other waterside locations prone to winter flooding, which it will tolerate.
Did you know?
Individual Black Poplar trees are either male or female (dioecious). The male catkins are purple and produced in spring before the leaves unfold. The female catkins look like strings of green beads. The fresh seeds need to fall upon damp ground soon after dispersal to stand any chance of germination. The drainage of floodplains and engineering of rivers means that fewer suitable germination habitat exists nearby. This, coupled by the extreme rarity of females, (maybe only 5% of all the native black poplars are female) has led to the decline of this tree.
- Very Large - 20 metres+
- 15-20 metres
Shape / Habit
- Very Fast
- Full sun
Difficulty / Hard to Grow
Evergreen / Deciduous
- Small leaves
- Parkland Tree
- City/Urban Sites
Native / Naturalised
- Wet/Water logged sites
- Good for Windy sites
For the continued healthy growth of your trees, shrubs or hedging it is vital that you follow the advice below.
The main reason that plants die within 12 months of having been planted is lack of water. It is essential throughout the spring and summer, to give a heavy enough watering to enable the water to penetrate right down to the deepest root level of the tree. In hot dry spells give the equivalent of 2 bucketfuls every three days.
One of the most common causes of lack of water is competition from grass. When trees are first establishing, the grass roots would be at the same level as the tree roots and are far more efficient at taking up water and thus choke the tree. It is vital that for at least 3 years after planting your tree or hedge has a circle or strip one metre wide completely free of grass.
- Mulch mats are an effective way to stop grass and weeds, although they will require a careful eye to make sure they continue to work. After clearing the ground around the tree, firmly fit the mat by tucking the edges into the soil and put a thick layer of bark mulch on top of this. Be careful not to allow the woodchip to touch the stem as it can cause rot.
- Weed killer is very effective, however it is harmful to the environment. Organic weed killers usually do not kill roots. Weed killer needs to be applied each year for the first 3 years, preferably when the tree is dormant, or just once before applying a mulch mat.
- Mowing or strimming is NOT an answer to the problem. Each time you mow, the grass will grow back more vigorously and strimming invariably leads to lacerated trunks.
If trees are not correctly secured they will rock in the planting pit. Roots not firmly in contact with the soil are unable to take up moisture and nutrients, resulting in die back or death of the tree. Check, particularly after windy weather, that stakes are still solidly in the ground keeping the base of the trunk firm. The purpose of the stakes is to anchor the roots. Flexing in the wind, higher up the trunk, is not necessarily a problem if the roots are firm.
Bellow is list of the correct system to use to secure your trees.
- 40/60, 60/80, 80/100 whips - Unless rabbit/deer problem no need to stake.
- 100/125, 125/150 1.2m Cane and Easi tie.
- 150/175 1.2m square stake and a buckle tie and spacer.
- 175/250, 6/8, 8/10 15L 1.65 Tree stake and a buckle tie and spacer.
- All larger trees. 2 x 1.65 Tree stake and cross rail with 38mm cushion spacer and 1m of 38mm strapping.
Always use our recommended tree ties or strapping. These are designed and manufactured with the correct amount of give to hold the tree firm without strangling it. They should be checked at the end of each growing season for adjustment as the trunk thickens. Non proprietary materials such as baler twine will cut into the bark and should not be used.
Protection from Animal Damage
Rabbits, deer, sheep, cattle and horses can all potentially damage trees. Ask us for advice on the most appropriate guards for your trees or hedge. Squirrels are also a terrible pest when trees get to about 20ft tall but there is no protection available.
Are the delivery costs the same no matter how many plants I order?
Yes the delivery costs are the same no matter how many plants you have on your order. They are worked out based on your distance from our nursery and can be found here.