New Bought Hibiscus Transplanted In Outside Pot

Question

The buds on my two new potted hibiscus yellowed then fall before flowering

Answer 1

Newly purchased hibiscus can be sensitive to new surroundings so give them a break until they become established in their new location. Water adequately if temps are hot, fertilize as needed and provide 6 hours of sunlight or more. Test the soil regularly to detect when it is dry; some potting mediums will lose moisture faster than others. Look for thrips, aphids, mealy bugs, spider mites too as these insects can cause bud drop.

https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm