12" Summer Annuals

Brighten your outdoor spaces with these 12-inch potted summer annuals, sold at Costco seasonal garden centers. These container-grown flowering plants are ideal for patios, porches, entryways, and garden beds, delivering vibrant color throughout the warm season.

Summer annuals in this size typically include popular varieties such as petunias, marigolds, geraniums, impatiens, begonias, and mixed arrangements, with exact varieties varying by location and availability. The 12-inch pot size provides ample soil volume for established root systems, supporting vigorous blooming with regular watering and fertilizing.

Plant in a sunny to partly shaded location depending on variety. Water consistently to keep soil evenly moist and deadhead spent blooms to encourage continuous flowering from late spring through first frost.