Cauliflower mayflower F1 Hybrid Is The Earliest Summer Cauliflower Of All! Ready To Cut From Mid May To Early June. Mayflower Produces Delicious Tender Heads Up To Eight Inches Across.to Achieve This, Sow January In Warmth Growing On In 31/2in/9cm Pots Before Planting Outside In Late March.the Great Thing About Cauliflowers Is That By Using Different Varieties, You Can Now Harvest At Any Time Of The Year. Its Such A Versatile Vegetable, It Goes With Just About Any Meal.