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- Q.Grevillias And White Oil - I have been advised to use white oil insecticide on my Grevillias for black scale and other pests. It won't ...
- Q.Spotted Garden Slug - I have just been pruning under a large Grevillea, as its lower branches were laying on the ground. I have ...
- Q.Grevillea ‘Long John’ - I have a 3yr old Grevillea 'Long John' in the ground. It is thriving and looks beautifully alive. ...
- Q.Can I Graft A Weeping Scion To An Older Grevillea Tree - Very new at this game. wishing to try my luck at grafting
- Q.Can You Identify This Plant In My Garden - It is a pine like evergreen small shrub covered in red flowers at the moment. Thanks
Asked by
Anonymous on
October 17, 2011Q.Grevillias and White Oil
I have been advised to use white oil insecticide on my Grevillias for black scale and other pests. It won't harm the bush, will it?
Answered by
Nikki on
October 17, 2011
Certified ExpertA.Just make sure that you do not use it in bright light. White oil can occasionally burn a plant on a very sunny day. You may also want to look into neem oil. It is effective on these pests and safe for people and pets and will not intensify sunlight. Here is more info: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
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- Asked by
rodjules23 on
September 2, 2012Q.Spotted Garden slug
I have just been pruning under a large Grevillea, as its lower branches were laying on the ground. I have come across two very large spotted garden slugs - Limax maxumus. I have found one other one about 12 months ago. Can you tell me how to get rid of them please?
- Answered by
Nikki on
September 2, 2012
Certified ExpertA.Here is a link to an article that should help you out: https://www.gardeningknowhow.com/plant-problems/pests/facts-about-slugs-and-how-to-kill-garden-slugs.htm
Was this answer useful?00 - Asked by
elsid2272 on
September 30, 2017
93001/ZONE 9Q.Grevillea ‘Long John’
I have a 3yr old Grevillea 'Long John' in the ground. It is thriving and looks beautifully alive. But for the last 3 months or so the foliage is turning from a dark green to yellow. I had been watering it twice a week for 8 minutes and when I noticed it getting lighter I changed it to 8 minutes once a week. It did not seem to make any difference, it is now almost yellow. But it still looks absolutely blooming. WHY IS THIS PLANT TURNING YELLOW?
- Answered by
BushDoctor on
October 1, 2017
Certified ExpertA.This sounds like a pH issue. Is this close to any water outlets, or maybe the street? It appears to be experiencing some pH swings. I would recommend applying dolomitic lime to the area around the tree. Here is a link to some articles that will help: https://www.gardeningknowhow.com/houseplants/grevillea/
Was this answer useful?00 - Asked by
Osker on
June 29, 2020
Queensland AustraliaQ.Can I Graft A Weeping Scion To An Older Grevillea Tree
Very new at this game. wishing to try my luck at grafting
- Answered by
BushDoctor on
July 1, 2020
Certified ExpertA.As long as you graft from the same genus, then it is possible.
Here are some articles that will help:
https://www.gardeningknowhow.com/garden-how-to/propagation/grafting/rootstock-information.htm
https://www.gardeningknowhow.com/garden-how-to/propagation/grafting/what-is-a-scion.htm
Was this answer useful?00 - Asked by
Anonymous on
April 17, 2021Q.Can You Identify This Plant In My Garden
It is a pine like evergreen small shrub covered in red flowers at the moment. Thanks
- Answered by
GKH_Susan on
April 18, 2021
Certified ExpertA.It appears to be a Grevillea.
https://www.gardeningknowhow.com/houseplants/grevillea/container-grown-grevilleas.htm
https://www.gardeningknowhow.com/houseplants/grevillea/grevillea-plant-care.htm
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