The leaves on my 2 hoya plants which cover an arch and are in the ground are turning yellow.
The plants are 20 years old and flower every year. I recently pruned a nearby tree which means the arch now has more light. What can I do ?
Hoyas don't fare well in full sunlight. While they can handle morning sunlight, they will not tolerate the harsh afternoon light. You may need to erect a shade cloth or similar to help diffuse the light, otherwise, leaves may continue to drop from heat stress.
Answered: 14 Jan, 2021