- Worldwide Distributors of Seed for Landscapers, Homeowners, Architects, Gardeners, and Hydroseeders Blue Flax Linum perenne lewisii This perennial's delicate petals fade and fall off during the heat of the day, to be replaced by fresh flowers the next morning. Blooms from mid-May through June. Sunmark Sports provides a complete range of Sports Field Materials, Equipment and Supplies. | | ...www.sunmarkseeds.com