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eucalyptus gunnii leaves goin brownish red


 
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banner
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PostPosted: Sun Jul 03, 2011 1:12 pm    Post subject: eucalyptus gunnii leaves goin brownish red Reply with quote

Planted a little eucalyptus gunnii couple weeks ago and the lower leaves are starting to go brownish red. i did a search ans saw if fertiliser was not mixed with compost it could contact roots and cause that. I used some osmocote and general compost and mixed it well beofr planting. i watered it regularly as instructed and then there was heavy rain so did not need to

i went back to the garden centre to look at where i picked it up and saw the same effect on lower leaves?
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Margo
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PostPosted: Sun Jul 03, 2011 5:40 pm    Post subject: Reply with quote

Oh dear I hope you haven't one with a virus. Especially as you say others at the garden centre have got it. I expect somebody on this forum will be able to advise you.
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gardenman
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PostPosted: Thu Aug 04, 2011 4:11 pm    Post subject: Reply with quote

It won't be the osmocote/fertilizer as this has a slow release built in to avoid burning. If the garden center also has it, the entire crop has the same problem so its nothing you did.
Chances are its a delayed reaction to frost damage earlier in the year, gums suffered badly and it can take months for the damage to manifest itself.
Alternatively, its just a natural process of the crops shedding its lower leaves. If the crop was grown close together in the G/C/nursery light would have been limited, so the tree will have decided to discard them to put all of its resources into the more productive leaves closer to the top.
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PostPosted: Tue Aug 16, 2011 3:19 pm    Post subject: Reply with quote

Thanks guys. My ittle eucalyptus gunnii seems to be growing at an amazing pace anyway. i wondered if it would be OK to put one in the middle of a small lawn. Is that too exposed ?
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Margo
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PostPosted: Tue Aug 16, 2011 3:30 pm    Post subject: Reply with quote

I wouldn't put it in the middle of a small lawn, as its quite fast grower and can grow 20 foot or more.
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The Garden Shop
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PostPosted: Tue Aug 16, 2011 6:10 pm    Post subject: Reply with quote

Hi banner,Gardenmans post makes great sense. Also sometimes a high moisture level in the compost can cause a blistering of the leaves and they turn brown, could this be the case with your tree i wonder? about the position of where you might plant your eucalyptus, gunnii will tolerate an exposed site so plant away
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walltoall
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PostPosted: Tue Aug 16, 2011 7:14 pm    Post subject: eucalyptus gunnii Reply with quote

Banner,
I have a eucalyptus gunnii about 9yrs old and already it is over 30' tall. They can grow to over 35m on a single stem, but some people slash them and then they grow wide and the height is controlled. But doing them that way they take up a lot of space. There is one in Wisley covering the size of a tennis court.

How big is your garden and how high is your sky?



eucalyptus.JPG
 Description:
Did I say 30' ? The house is 30' high. The wagon is over 6'. The nice tree beside it is a silver birch which i think tips out at about 30'.
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eucalyptus.JPG



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Last edited by walltoall on Tue Aug 16, 2011 7:38 pm; edited 1 time in total
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Margo
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PostPosted: Tue Aug 16, 2011 7:19 pm    Post subject: Reply with quote

I used to cut mine back every year. One year I didn't and it ended up 20 foot high. I dread to think how high it would have gone if I hadn't cut it back. I ended up with its trunk about 2 ft in circumference.
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medieval knievel
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PostPosted: Thu Aug 18, 2011 12:26 pm    Post subject: Reply with quote

one easy benchmark when guessing the height of a tree is to compare it to a double decker bus - dublin bus, for example, use double deckers which are 14'3".
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walltoall
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PostPosted: Thu Aug 18, 2011 7:26 pm    Post subject: how high is my Eucalyptus Reply with quote

Thanks for that Medieval. I won't make any jokes about not getting too many double decker buses down where we are lol. Seriously though, (if anyone can be serious about the height of a eucalyptus) I measured from the ground to the top of the upstairs window and got 15'11" and that's about half the tree. So I'd reckon the tree should be about 30'22" oops I mean 32ft. at the minute. Tell you one thing though. It makes a brilliant shade outside the front door in the Summer for the car at the hottest time of day. We get a lot of hot sun here. It makes up for the pollution Twisted Evil
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