Thank You {Zinnia} Grow dwarf zinnias in a windowsill or any sunny spot indoors, year-round, directly in the leak proof bag. Zinnias are easy to grow beautiful plants with multi petaled flowers that bloom in a variety of bold colors. A growing expression of thank you that will remind the recipient of your gratitude. Zinnias have a long blooming season from spring through autumn. This Thank You Garden in a Bag—one of our best sellers—makes a heartfelt Spring gift, offering a simple way to express gratitude with something that grows. A favorite for appreciation gifting, seasonal displays. Includes: seed, OMRI listed soil, OMRI coconut husks for drainage, directions.