Quick-growing vegetables perfect for cool spring and fall growing conditions include leafy greens, carrots, beets, radishes, and peas. Started from seed, many are ready for harvest in just four to six weeks.
Fast-growing root veggies such as radishes, beets, and turnips also thrive in cool conditions and take less than two months to mature. Fall is also a good time to plant onion sets and garlic cloves for harvest in late spring or summer of the following year.
Fall is Good for Root Growth
Warm soil temperatures encourage root growth – more so than in the spring when the soil is still warming up. Plus, with the shorter days and cooler air temperatures, plants spend less energy on growing foliage and flowers and more on building a strong root system in preparation for winter.
Although each plant's needs may vary and some will be more winter-hardy than others, in general about a month before the last fall frost is sufficient in giving the plant enough time to establish itself and take root.
Salad Greens
Most greens take about 30 days until the beginning of harvest. The best part about greens is that they are a “cut and come again” vegetable which allows you to harvest greens all season long. Arugula – Give this vegetable a month to grow, and you will have some peppery-tasting greens to add to any salad.
Chives. Chives are a great herb to grow on your kitchen counter! They come up very quickly—it'll only take 2-3 days for chives to sprout. Additionally, they are quite happy at room temperature, just place it near a sunny window.
Those include: beets, broccoli, Brussels sprouts, cabbage, carrots, cauliflower, celery/celeriac, collards, chicories, fennel, greens, kale, kohlrabi, leeks, lettuce, onions, parsnips, peas, radish, rutabaga, spinach, Swiss chard, and turnips.
Brussels sprouts, broccoli, cauliflower and cabbage are brassicas (also called Cruciferae) and the plants in this species are wonderful for the fall/winter garden. In fact, you can continue to harvest Brussels sprouts even after a snow. Broccoli, cauliflower and cabbage are tolerant to about 26°F.
Radishes are one of the fastest-growing crops and can be grown either in the ground or in raised beds, pots, or containers. Sow the seeds thinly and thin seedlings out until they are an inch apart. Water regularly and harvest when the radishes are about an inch in diameter.
Bamboo is the fastest growing plant on earth. Some species of bamboo can grow more than 1 meter per day, which is about 4 cm per hour. No other plant grows faster. Two examples of such fast growing bamboos are Madake (Phyllostachys reticulata) and Moso (Phyllostachys edulis).
Summary: Wolffia, also known as duckweed, is the fastest-growing plant known, but the genetics underlying this strange little plant's success have long been a mystery to scientists. New findings about the plant's genome explain how it's able to grow so fast.
Early-season potato varieties are planted first in spring and are ready to harvest in 60-80 days. Mid-season varieties mature in 80-100 days. Late-season potato varieties are ready to harvest in 100-130 days.
Garden Cress
Like beans, cress can be grown in water without soil. However, it does grow very well in soil sitting in sunny windowsills, containers and even outside. Germination occurs within five to 15 days.
Plant Flowers and Vegetables
If you live in a frost-free region, October is a great time to plant cool-weather flowers and vegetables in your garden. Crops such as kale, cabbage, collards, lettuce, carrots, mustard, onions, Brussels sprouts, cauliflower, beets, and garlic can all be planted in early to late October.
Plant your fall vegetables so that the crops you choose have time to reach maturity before the first frost in your area. Find your first frost date, then count backward based on days to maturity for each type of veggie you want to grow. That's your ideal planting date.
Mid-August to mid-October is an ideal time of year to plant new trees, though, that time frame can be stretched into November and December. To be 100% sure, measure soil temperature early in the morning for a few, consecutive days. If your soil is consistently 50° F or higher, you're good to plant.