Acer platanoides 'Crimson Sentry'
- Position: full sun or partial shade
- Soil: fertile, moist, well-drained
- Rate of growth: vigorous
- Flowering period: April to May
- Flower colour: yellow
- Other features: red-purple leaves turning red, brown and orange in autumn
- Hardiness: fully hardy
Dark red-purple leaves turning red, brown and orange in autumn and small clusters of red-tinged, yellow spring flowers. This handsome Norway maple makes an excellent specimen tree for a medium-sized garden. Narrowly upright in habit, it is pollution-tolerant and thrives on almost any soil, including clay.
- Garden care: Add a top-dressing of a multi-purpose fertiliser around the base of the plant in late spring. No routine pruning is required, just remove any dead, damaged or crossing branches in late autumn or winter when they are fully dormant.
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Q:Can you tell me the approximate height of the tree when delivered from you please, so that I can compare with any other supplier?
Thank you in anticipation.Asked on 30/7/2013 by kevthered from Staffs
These trees come in a 10 litre pot and will be around 1.5-1.8m tall.Answered on 31/7/2013 by Helen from Crocus
Q:How can we stop Powdery Mildew on our Norway Maple tree?
Hi. We purchased a Norway Maple tree around 3 years ago from Crocus, and every year towards the end of the Summer, the leaves have a powdery white mildew on them. We do have clay soil, but try to keep the tree well watered in dry weather. We have also tried a mildew spray, this seems to prevent any further mildew from appearing at the time. Do you have any suggestions as to how we can stop it appearing this year? Many thanks for your time. FionaAsked on 15/2/2010 by Anonymous
A:Hello Fiona, Powdery Mildew is caused by poor air circulation around the branches and dry soil around the roots. We do have a page on our site which you may find useful so just click on the following link to go straight to it. http://www.crocus.co.uk/pestsanddiseases/_//top12/Powdery%20mildew/ArticleID.1174 I hope this helps. Helen Plant DoctorAnswered on 16/2/2010 by Crocus Helpdesk
Q:Fungus and dry leaves on Acer?
Hi there, I have noticed in the last week that one of my Acers has developed very dry yellowed leaves and a white soft fungus on its bark, what do you think this could be? My other Acers are fine, but I'm worried that this will spread. What can I do to remove/avoid this? Kind regardsAsked on 14/9/2009 by nikki craig
A:Hello There, Acers are prone to a number of pests and diseases, but I suspect yours is suffering from a wooly scale - just click on the following link for more information. http://www.crocus.co.uk/pestsanddiseases/_/pests-and-diseases/stems/artcat.6/ I hope this helps. Helen Plant DoctorAnswered on 23/9/2009 by Crocus Helpdesk
Q:Acer platanoides 'Crimson Sentry' leaf problem?
Hi, I purchased an Acer plat. 'Crimson Sentry' tree last year. It has been splendid all summer with lots of new growth, a lovely rich red. Now, however some of the leaves have a white powdery covering on the upperside of the leaves. Can you advise what is causing this. The leaves will be falling shortly so will next years leaves go the same. Thanks MaureenAsked on 4/9/2009 by maureen griffiths
A:Hello Maureen, These plants are prone to Powdery Mildew, and it sounds as if yours had been affected - just click on the following link for more information. http://www.crocus.co.uk/pestsanddiseases/_//top12/Powdery%20mildew/ArticleID.1174 I hope this helps. Helen Plant DoctorAnswered on 4/9/2009 by Crocus Helpdesk
Q:Leaf problem on new tree-will it spread to other trees?
Hi, I purchased two Acer plat. 'Crimson Sentry' trees in April of this year and have noticed a white powdery substance has taken hold on the leaves of both trees. Initially I thought it would go away but it has spread to almost every leaf on both trees. Please can you offer any help on what this is and how I can get rid of it. Also, is it likely to affect the other two trees I purchased at the same time (Laburnum ?? watereri 'Vossii' and Robinia pseudoacacia 'Frisia'). Many thanks AmandaAsked on 1/9/2009 by Amanda Button
A:Hello Amanda, Acer plat. 'Crimson Sentry' trees are prone to powdery mildew, which would fit your description - just click on the following link for more information. http://www.crocus.co.uk/pestsanddiseases/_//top12/Powdery%20mildew/ArticleID.1174 The Robinia is unlikely to be affected by it, but the Laburnum is also prone occasionally. I hope this helps. Helen Plant DoctorAnswered on 4/9/2009 by Crocus Helpdesk
Q:Which Acer platanoides should I buy?
Please could you tell me which is the most attractive tree of the red coloured Acer platanoides ie 'Crimson Sentry', 'Royal Red', 'Crimson King' or other. Thankyou. CarolineAsked on 18/6/2009 by Holmdale Exmoor
A:Hello Caroline, They all have attractive foliage, so the distinguishing feature between them will be their size and shape. 'Crimson Sentry' is tall and thin and has an eventual height and spread of 12 x 5m, while 'Crimson King' is a much bigger tree with a wider canopy growing to 25 x 15m. I hope this helps. Helen Plant DoctorAnswered on 19/6/2009 by Crocus Helpdesk
Q:Is there an evergreen Acer?
Could I just ask if there is an Acer that is not 'deciduous' but 'evergreen'?Asked on 14/3/2005 by Susan McGarragh
A:Sadly not as all Acers are deciduous.Answered on 16/3/2005 by Crocus
By November the garden is well and truly dormant, so it’s a good time to prune many deciduous garden trees. As for October, prune newly planted trees to remove any damaged growth and help balance the shape of the canopy as well as maintain a dominant mainRead full article
The garden is at its most dormant right now, so it’s a good time to catch up on any pruning missed or forgotten since the autumn. If the weather isn’t favourable, you can leave it for a week or two, but make sure all winter pruning is completed before theRead full article