The key to successfully treating any problem is to act quickly. My only defence is some bug spray (says it kills caterpillers) but that doesn't make any difference - so my solution is to squash the leaves that they hide in. One thought on “ Why Are the Leaves of My Geraniums Turning Yellow? Updated Jan 05, 2019; Posted Jul 16, 2013 . It has never looked particularly healthy. To avoid yellow leaves, Calatheas need bright, indirect light, high humidity, and consistently moist soil. Feed it a fertilizer specifically formulated for acid-loving plants, following label directions for dosage rates. I'm slowly learning why gardeners get so annoyed by pests as they really can destroy all your hard work and patience. Is this normal or is there a problem? But by then the plant feels very very dry. Seek advice as soon as you notice the discolouration as there could be a swift remedy that will restore the plant to full health. New plants are most susceptible to drought damage, while frost … However, yellow leaves can also be a sign of many different problems with your orchid. There are a multitude of reasons why the leaves on a laurel turns yellow. Question: I saved a few geraniums from my garden and brought them indoors for the winter.Now they’re losing a lot of leaves: they turn yellow and cling to the plant. If your plant is not getting enough water, its leaves will start to droop so the plant can prevent excess transpiration. We have 14 cherry Laurels that were put in last November and 2 or 3 of them are starting to develop yellow leaves and they are starting to go crispy now. Left untreated, the yellow leaves deepen in color and turn brownish-red. I can see anything on the plant. In cherry laurels, the condition is often brought on by alkaline soil. Fungal diseases responsible for yellowing laurel leaves mostly occur in spring, during cool, warm and moist weather. By Clarabella_w. Some leaves in the centre of the tree are turning yellow. These leaves usually turn yellow and then drop, only to be replaced by healthy new leaves. Posted on: June 3rd, 2015. Laurel shrubs thrive in well-draining, acidic soils. All Rights Reserved. Improper soil conditions also cause yellowing leaves on a laurel. Why are my Calathea leaves turning yellow? Severe drought adversely affects plant growth and flower production. Let’s investigate and get to the bottom of this! Test the soil's existing pH to determine the amount of ammonium sulfate needed to correct the problem. ; 1999, The Connecticut Agricultural Experiment Station; Mountain-Laurel (Kalmia); 2007,