Your plant should also be exposed to bright, indirect light during the rest of the day.
When the plant is left in a south window all day without a sheer curtain for shade, the leaves will scorch, becoming very pale or tan.
Other signs that the Hoya is not getting enough light are new leaves that are small and pale green, long sections of bare stem, slow growth and dead mature leaves.
The water will also be at room temperature which is better for Hoyas. Fresh tap water is very cold and could stress these tropical plants.
Wet soil deprives the Hoya roots of oxygen and encourages root rot.
If they have black tips or the whole root is black or brown and mushy, the Hoya has root rot. If most of the roots are rotten, the plant should be thrown away. If only a few are bad, repot it using peat-based potting soil that contains perlite or vermiculite for improved drainage. Be sure to use a container with drain holes. Water it immediately but then let the soil become completely dry before watering again. [4] X Trustworthy Source University of Vermont Department of Plant and Soil Science Plant and Soil Department at University of Vermont’s College of Agriculture and Life Sciences Go to source If the plant shrivels, it is not being watered often enough. Water it more often.
The number in the middle (10) is phosphorus which promotes flowering. It should be higher than the first number (5) which is nitrogen because nitrogen causes stem and leaf growth. The third number (5) is potassium which supports light absorption. It should be about equal to the first number.
Check the label on the bottle and follow the manufacturer’s recommendations.
When the Hoya is getting fertilizer too often, the new leaves are darker green and smaller and the stem length between the leaves becomes shorter. Reduce the frequency to every five to six weeks if that happens.
Fill in around the roots with potting soil and water it generously to settle the soil and give it a good drink.
If they attack, set the Hoya in the sink or tub and wash the aphids off with a strong spray of water. [9] X Trustworthy Source Missouri Botanical Garden Oldest botanical garden in the U. S. and center for botanical research and science education Go to source
