Which plants grow in 3 weeks?
Radishes These crunchy delights are among the fastest-growing fruits from seeds. In as little as 30 days (3 to 5 weeks), you can have a fresh batch of radishes ready to spice up your salads. Growing radishes is a breeze. They prefer cooler weather, making them perfect for spring and fall gardens. Radishes. The humble radish might just be the quickest-growing vegetable from seed to harvest. Radishes prefer to be direct seeded in spring and early summer, and most varieties are harvestable between 25 and 35 days.Radishes Sowing tips: Radish is unquestionably the speediest veg around and germination takes place in as little as 3-6 days. You’ll just need a minimum temperature of 12C to kickstart germination. Sow the seeds in trays at a depth of 1cm and lightly cover with compost.