- You will get 150 Seeds of Rocket Larkspur Colorful Mix Flower Seeds. - Sunlight: Full Sun. - Life Cycle: Annual. - Watering: Medium. - Rocket Larkspur Mix Seeds. - This mix comes in many varieties of colors, provides an excellent cut flower, and is native to Europe. - The leaves and seeds of this flower are poisonous, so caution must be taken when planting around children or pets. Rocket Larkspur can be either spring or fall planted. - During spring, if you put Rocket Larkspur seed in the refrigerator for two weeks prior to planting you may yield better results. A burst of cold typically initiates germination. Blooms can be expected anytime between spring and fall. Rocket Larkspur can be started indoors, but must be transplanted when the plants are small. - Average planting success with this species: 80%. - Height: 3-4 feet. - Germination: 15-30 days. - Optimum soil temperature for germination: 50F-60F. - Sowing depth: 1/8". - Blooming period: April-September. - Seeding rate: 10 lbs. per acre. - 1 oz Covers: 272 sq. ft. - Suggested use: Mixtures, roadsides, waste areas, floral gardens.