Why are my Magnolia Little Gems losing leaves and have black edges?
Was hoping you could have a look at the attached photo and suggest what the cause might be of the leaf drop. Lower leaves turn yellow, then brown, then drop. Haven't changed the watering cycle, some trees still showing new growth (have 20 arranged as a hedge). Have been installed for 12 months. Thanks !
The fact that the trees are still putting on new growth is a good sign so I don't think there is anything sinister happening. You might like to look over the trees to make sure there are no sap sucking insects such as aphids, scale or mites present. Look for any fine webbing on the foliage which would indicate mites being present. All of these pests can be controlled with regular sprays of Yates Nature's Way Vegie & Herb Spray Concentrate. Ensure the plants are receiving enough moisture and make sure the area in which the trees are growing is well drained. Check to see if there is any dieback on the branches as poor drainage could indicate a problem. If the new foliage is green and healthy, that is a good sign that the tree is taking up the necessary nutrients it needs to thrive. The yellowing of the older leaves may be a result of the tree not receiving enough nutrients at that particular time in its growth habit. It is getting a little late now to be fertilising but once spring arrives, you can apply a good quality fertiliser. We would suggest applying Yates Thrive Natural Roses & Flowers Pelletised Plant Food. Keep a regular eye on your plants and if there is any change in their health, it might be wise to take some samples of foliage down to your local nursery for further inspection.
From your friends at Yates Gardening
Answered: 24 Apr, 2014