In addition, the plants also need to be routinely monitored for pests and diseases. This means that your plant wont have the energy and nutrients that it needs to grow as fast. I have a eucalyptus tree about 4.8. metres high and 6 metres away from my house. I do however feel that it would be worthwhile to give your tree a feed with a general balanced fertiliser such as Fish Blood and Bone Meal or Vitax Q4, and hopefully when the new leaves appear during the summer months they are healthy. If the brown/red spots still appear on the new leaves I would be grateful if it is at all possible for your to email BBC Radio Lancashire with a photograph of the infected leaves so that I can identify the problem. This is because air pollution can trigger Eucalyptus oil to deteriorate. Older, inner leaves turn yellow first. When used as a medicine, the leaves of the eucalyptus plant are boiled in plain water. So, whatever the problem, we like to think Bill can sort it out at least that's the theory! Can you offer any advice please? One common error is to immediately drown the Rainbow eucalyptus after a dry period in the belief that it requires a lot of water. Known as root, collar, foot, or crown rot If you need to replant it, choose a pot that is an inch or two larger. A well-draining, loose potting soil mix will also help in this regard. This is because the terpinen-4-ol remains. This website is published by Immediate Media Company Limited under licence from BBC Studios Distribution. There are many reasons to cultivate the plant but be sure you are caring for it properly. One of the most important things that you can do for the health of your Eucalyptus Plant is to make sure that the soil that you choose is very well drained. Ive had it about 4 weeks, and have re-potted it into a pot twice the size it came in (I dont have the option to put it in the ground unfortunately) and positioned it in a very sunny spot on my patio. Disease: First, if there is an excessive amount of disease within the tree, then you should treat the disease as soon as possible to prevent your tree from dying. I am told that the trees will grow 3 feet a year. Inappropriate water levels, lighting, humidity, soil, temperature, and container can all kill a eucalyptus plant. The underside of marigold and tomato plant leaves will turn purple with too little phosphorus while other plants will be stunted or turn a dull, dark-green color. Choose a sunny spot with well-draining soil. The main thing that determines when it is time to remove your Eucalyptus tree is how it looks to you. Eucalyptus roots tend to circle densely when growing in round pots, and they can get tight and tangled. If it is the older, larger leaves that are turning pink or red then this will what is happening.