5 Unusual Houseplants You Might Never Have Heard of Livingetc Here are 15 fast growing vegetables that go from seed to plate in about 30 days: Radishes: These peppery roots are the speed champions of the garden, often ready in just 22 days. Milorganite 32 lbs. 2,500 sq. ft. Organic Plant Fertilizer Slow Release Nitrogen Garden and Lawn Fertilizer 6 4 0 100539618 The Home Depot Sunflower seeds are growing TOO fast and last frost date isn't until April 15. Should I go ahead and thin repot? : r gardening