Eucalyptus sideroxylon is called red ironbark because mature trees develop deeply furrowed reddish-brown bark. As a tree prepares to shed its leaves in winter, a layer of cells form across the base of the leaf stalk which restricts the movement of sugars back into the body of the tree. A fungal infection causes browning foliage. The tree is also causing a problem as almost half of it is overhanging my garden and blocking the guttering of my house in the front and back. I live in South Florida and the trees are located in full sunlight close to an acre-sized pond. 2. Discussion in 'Trees' started by melanie93, Jun 19, 2017. melanie93 Apprentice Gardener. ~I suspect that lack of water is the problem, particularly with a young tree. ~ Keep it damp at the roots (even in winter) Question: I have two rainbow eucalyptus trees, about 4' in height. There are three major problems with eucalyptus for which it is not a preferrence planting. Thus, the plant dehydrats the surroundings. Its root system absorbs a lot of water from soil. If you're partial to crimson, you might wonder why nature seems to go overboard with the red some years and forget it entirely during others. I also have a very large eucalyptus tree in my garden in sw scotland. Eucalyptus can vary in form from a short shrub to a tall, evergreen tree. All of a sudden the tree is losing leaves at an alarming rate, one gust of wind and my whole garden is covered!!! ~ Remove the damaged foliage. This tree may grow strongly upright to 80 feet tall, or it may be weeping in form and remain below 20 feet tall. Eucalyptus IS EVERGREEN. The evergreen plant group also contains large shrubs. It's what they do. Can you offer any advice please? i did a search ans saw if fertiliser was not mixed with compost it could contact roots and cause that. Eucalyptus tree leaves turning brown and dropping? The low-maintenance, fast-growing plants have low water requirements. normally at this time of year some of the leaves turn red, others remain green and some drop. This year half the tree has brown, dead looking leaves, there are 4 or 5 main limbs, 2 of them are normal and the other 2 are brown. Native American lore explained the appearance of the magnificent colors as coming from above: After hunters killed the Great Bear in the sky, the story goes, its blood splashed down and turned the leaves red. Why leaves turn red. Posted: Sun Jul 03, 2011 1:12 pm Post subject: eucalyptus gunnii leaves goin brownish red Planted a little eucalyptus gunnii couple weeks ago and the lower leaves are starting to go brownish red. Over the last few weeks the leaves on the lower branches have started to drop and this is gradually working its way up the tree and now most of the leaves on the lower half of the tree have died. Eucalyptus (Eucalyptus spp.) My question is my trees arrived green with green leaves but now the bark and the leaves are a red color. My eucalyptus tree (approx 4yrs old) seems to be dying. The width ranges from 20-45 feet. Joined: Jun 18, 2017 Messages: 2 Gender: Female Ratings: +2. The once beautiful green/silvery leaves are turning brown and the tree is drying out. 1. The bark is a blue-grey colour and peels off in strips to reveal yellow patches underneath. Eualyptus, although evergreen, will shed leaves often a lot at once. I have a tall established eucalyptus tree in the back garden. Leaves on juvenile plants are bluish white and lancelike in shape. Sometimes, a red resin exudes through breaks in the bark, hence the tree’s other name – the gum tree. Look out for: young leaves that are usually stemless and rounded. Hi, I'm new to the world of gardening moving into my first home with a garden in march. trees belong to the myrtle plant family and adapt well to a variety of climates. ~Also - siting could be a problem; if it is sited so that it is prone to cold winds etc., this could cause the leaves of a young tree to go brown.