I have a snow gum which produces a mass of white blossom in the summer - hence 'snow'. It is now about 25 years old and about 30 feet high. I bought it because it does not grow too tall. How tall should it grow to? Does it have a finite lifespan? This winter (not especially cold) all the leaves have suddenly turned a rusty-red colour instead of the normal silver/green. They have, by and large, remained on the tree and the bark looks healthy. I assume the tree is dead. I assume that it has a fungal infection - there are no other eucalypts in the vicinity. Is there no hope of a recovery?
My research shows that 30 feet is the maximum height for this tree.
From your description it very much does sound like a Phytophthora fungus.
You can check with your County Extension Office to see if they have any other reports of this issue with other trees in your region.
https://www.gardeningknowhow.com/extension-search/
https://www.gardeningknowhow.com/ornamental/trees/eucalyptus/eucalyptus-tree-problems.htm
Tree does not seem to be doing well. I am concerned about watering - over/under? I am in Escondido CA. Planted the young tree Nov last year. Ten got into high 30's couple of days but rarely. Soil drains well. Currently watering 1 gallon every 3 days.
You are outside the recommended growing zone for the Rainbow Eucalyptus.
The temperatures and growing conditions may not be meeting the needs of this tree.
This is the likely reason for the poor condition of your tree.
I would also urge caution in growing this tree in a home landscape environment.
Here is a link with more information.
https://www.gardeningknowhow.com/ornamental/trees/eucalyptus/rainbow-eucalyptus-tree.htm
I have a eucalyptus tree that has been growing in full sun for 18 years..It has a few limbs with leaves but mostly looks scraggly..It is about 20 feet tall and loing well except for sparse leaves. What is the problem?
This link will help you with care information.
https://www.gardeningknowhow.com/ornamental/trees/eucalyptus/tips-growing-eucalyptus.htm
I have 3 trees here in California that I prune every 3 years. They are shedding a ridiculous amount of leaves in May and I still have 1 more year to go before the next pruning. The leaves are all red and we have had problems with the lerp psyllid in the past. Wondering if the massive leaf drop is just a normal seasonal thing or it's excessive because of the lerps.
Older leaves can be shed and as they age often turn red in color.
Stress can also lead to leaf drop; environmental or disease and pests.
If you have had past issues with pests make sure you are checking your trees regularly.
These links will help you pinpoint the issue.
http://ipm.ucanr.edu/PMG/GARDEN/PLANTS/eucalyptus.html
https://www.gardeningknowhow.com/ornamental/trees/eucalyptus/eucalyptus-tree-problems.htm
My Eucalyptus tree looks dead this year. Do they go dormant? or should I cut it down.
This plant does not go dormant. If the tree is looking top heavy or sagging it is because it has a very shallow root system. The roots can't take the weight. Any heavy wind could actually knock it over. Pruning is your best option. Trim the heaviest branches in the fall far back enough that it doesn't look top heavy. Hopefully this is the problem. I don't see a picture. Good luck.
I have a large Eucalyptus Tree that had three trunks. I had one of the trunks removed several years ago but new sprouts continue to grow. Is there something I Can spray to stop the new sprouts or to kill them when they first come up without hurting the tree ? Thank you for your help. Sincerely, Jim Sandoval
You may be able to use a tree sealant on the trunk to stop new growth. This will also help prevent disease from entering the plant at the stump. Check with your local garden center. If the Tree shares a root structure with the other trunks, such as all originating from a single plant avoid systemic herbicides as it may damage the rest of you clump.
I have become aware of many eucs in the forests that were cut down many years ago ,so the stumps are rotten, but young suckers are growing from these long dead stumps. Does this mean that the tree has been sustained in a state of dormancy , not photosynthesizing ? Can the soil microflora sustain the "dead" tree ? Does anyone out there know where I should search for answers to this type of question ?
I found a few links for you that may help with your research!
https://milliontrees.me/2013/04/09/biodiversity-of-the-eucalyptus-forest/
https://milliontrees.me/2014/08/22/understanding-the-eucalyptus-forest-professor-joe-r-mcbride/
http://www.agriculture.gov.au/abares/forestsaustralia/profiles/eucalypt-forest