Scorching summer heat can wilt or kill your hibiscus in just a day or two. Here are some tips to help:
Provide afternoon shade. Morning sun is good for blooms, and it is usually not as hot during the first few hours of the day.
Mulch heavily. This protects your plants during summer as well as winter. Mulch keeps soil and roots from drying out as quickly, as well as adding protection from weeds that steal water & nutrients.
Water often, but don’t drown your plants. Avoid spraying water on leaves. Soaker hoses or drip watering systems save water and put it where it is needed, above the root system.