* Gardening class. "Gardening in Hawaii" will be from 10 a.m. to noon Wednesday at University of Hawaii, Extension Office (CTAHR), Building 214, in Kahului. Students will learn about disease-resistant plants, which are well-adapted to tropical growing conditions. Cost is $15 per class $40 for three classes. For more information, contact Lorraine Brooks at 244-3242, ext. 229.