Thistle Flowers a popular filler flower comes in very unique natural colors. Thistle has a distinctive spiny snowflake-shaped bloom with a cone center. Incorporating Thistle into your flower recipes will add depth and texture. Each stem generally has a spray of 2 to 5 primary blooms, and can have several smaller blooms as well. Bunched in Bulk and sold at wholesale prices, look at this curated collection of thistle flowers available year round.