King Size Silvery White Strawflower Seeds Container Gardens in the Shade Eising Garden Centre Choosing Container Plants For Shade And How To Maintain Them Gardening Know How Modern White Outdoor Planters, Plant Pots, Box. White Tall, Large Fiberglass and White Metal Pots for Outside Plants, Trees. Entryway NMN Designs Black Licorice Herb (2 Pack) Bonnie Plants Getting double blooms with lots of petals I think direct seeding zinnia seeds can help (right into the soil outside), but I oftentimes start them in trays because I find that easier.