One of the fastest growing vegetables are radishes. Most varieties will be ready for harvest in just 25 to 30 days after planting.
While it can take 6 months for onion bulbs to mature, the green onion stalks can be harvested after just 3 or 4 weeks. You can also grow onion microgreens and have baby onion greens in two to three weeks.
Leaf lettuce such as Romaine can begin to be harvested about 30 days after planting. Cut the leaves once they reach at least 3 inches.
Baby carrots can be harvested after about 30 days. Other carrot varieties may take between 50 and 80 days to mature.
Spinach is ready in as little as 4 to 6 weeks after planting.
KALE & OTHER LEAFY GREENS
Kale, mustard greens and watercress are just a few delicious, super healthy greens that are fast growers. Most take about 50 to 65 days to mature, but baby leaves can be picked as early as 25 days.
Snow peas take only about 10 days to germinate and are ready for harvest in about 60 days.
Most varieties of bush beans are ready to harvest within 40 to 65 days from planting.
Turnip roots are ready for harvest after about 60 days, however the highly edible leaves can be harvested in only 40 days.
Most varieties of cucumbers can be harvested about 50 to 70 days after planting.
Many varieties of squash, including zucchini, are usually ready after about 70 days. For best flavor, harvest squash when they are still small.