Heat hurting hibiscus
We're having a heat problem in Toronto - 30+ every day. I have a hibiscus in a 12 inch pot (this is how I bought it) which is covered with blooms. However, a number of the leaves are turning yellow - I think because it is drying out so quickly with the heat. I am on the 4th floor with a terrace that is in full sun for at least 8 hours a day. Does anyone have any suggestions for keeping this plant happy - can I mulch it with something?