119-133 days. Nonstop Series pelleted seeds promise exotic and easy to grow begonias for especially hot and humid gardens across North America. Nonstop Series seeds mature into tidy 8-10 inch tall compacts ideal for indoor planters or as a neat trimming to your flower bed. Nonstop Series begonias grow one of the most dense and familiar blooms in any garden and are available in a specialty selection of signature colors. Begonias are the perfect eye-catching centerpiece to your summertime baskets, bouquets, and arrangements. Pelleted Seeds.