Deeply Rooted Organics Dial Seeder for Soil Blocks (Green) Adjustable Garden Sowing Seeder - Flower, Plant, and Vegetable Seed Spreader Save time and seeds! Accurately and quickly sow seeds. Create straight rows of evenly spaced plants in the garden. Save money... no more spilled seeds or over seeding. Easy to turn, adjustable dial controls the flow of seeds of different sizes. Works with most seed sizes. Perfect for seeding soil blocks and soil cubes.