Radishes are the quickest vegetable to grow in winter and can be ready to eat in just 25-30 days even in cool weather. No other crop comes close to matching this speed during the cold months of the year.
I grew Cherry Belle radishes in my cold frame last December and pulled the first roots on day 28. The seed packet said 22 days but winter adds extra time. You should expect all crops to run about 20-30% slower than spring harvests show on seed packets.
Cold temps and short days slow plant growth because roots take up water slower and leaves make less food. A radish that takes 22 days in May might need 30 days in January. Quick harvest vegetables still beat slow crops by a wide margin though.
Baby greens come in as the second fastest option among fast-growing winter crops. You can make your first cut at 21 days if you harvest leaves young. Let them grow a bit more and you get larger leaves in 30-35 days for bigger salads.
Radishes
- Days to harvest: 25-30 days in winter conditions makes this your fastest option for quick results in the garden.
- Best varieties: Cherry Belle and French Breakfast both mature fast and handle cool soil temps well.
- Growing tip: Plant in cold frames for the quickest results since warmer soil speeds up root growth by a week.
Baby Greens Mix
- Days to harvest: 21-35 days for the first cut depending on how big you want the leaves to grow.
- Best varieties: Mesclun mixes with arugula, mizuna, and baby kale give you variety on one plate.
- Growing tip: Cut leaves when they reach 3-4 inches tall and new leaves will grow back for more cuts.
Lettuce
- Days to harvest: 45-60 days for full heads but you can pick outer leaves starting at 30 days after seeding.
- Best varieties: Winter Density and Arctic King were bred for cold growing and resist bolting in cool weather.
- Growing tip: Grow under row cover for faster results and protection from hard freezes that damage leaves.
Succession planting keeps quick harvest vegetables coming all winter long. Sow a small batch of radishes every 2-3 weeks instead of one big planting. This way you always have fresh roots ready to pull instead of eating them all at once.
When I first tried winter growing, I planted all my radishes at once in early October. They came ready in a two-week window and I had more than I could eat. Half of them got woody before I finished them. Now I stagger my plantings and enjoy fresh radishes for months.
Cold frames and low tunnels speed up your fastest crops even more. The extra warmth from trapped sunlight can knock 5-7 days off your harvest time. Your January radishes might mature in 25 days instead of 30 under cover in most cases.
Spinach seems like it should be fast but takes 40-50 days to reach harvest size in winter. The thick leaves grow slower than baby greens. Save spinach for when you want large yields and stick with radishes when you need speed for the table.
You can speed things up by warming the soil before you plant seeds. Black plastic or clear plastic laid over beds for a week raises soil temp by 5-10 degrees. Warmer soil means faster seed sprouting and quicker root growth for all your crops.
I also tested lettuce mixes against radishes last winter in the same cold frame. The radishes were on my plate in under a month while the lettuce took a full 45 days to reach cutting size. Both tasted great but radishes win the speed contest every time.
Keep your quick crops watered but not soggy. Cold wet soil rots radish roots before they size up. Water in the morning so leaves dry before night falls and your winter harvests will come in on schedule.
Read the full article: Winter Vegetable Garden: Fresh Produce All Year
