What is the quickest veg to grow?
Radishes are well known quick growing vegetable crops, often sown amongst slower veg. They can be sown as early as February and should be harvestable 6-8 weeks later. As with many of these suggestions, sow some every 2-3 weeks to ensure supply throughout the summer. Radish Red Round. Radish Red Round is one of the quickest veggies to grow, often ready to harvest in as little as 25 days in ideal growing conditions. This variety of radish thrives in cool weather, so plant it in early spring or autumn in pots that are at least 16-18 inches deep.Radishes. Radishes are both a cruciferous and root vegetable—yet unlike many other vegeatables in these categories, they grow very quickly from seed. Radishes can handle the cold weather of early spring, and take only 30 days from seed to harvest, says Marie-Helene Attwood, founder of Edible Petals.