fast growing seeds

What Plants Grow the Fastest From Seeds?

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For many gardeners, waiting for seeds to germinate and plants to grow is part of the hobby’s reward. For others, however, it can be maddening, especially if you are gardening with children. Distract impatient growers with fast-growing plants while they wait for the rest of the garden to catch up.

Annual Flowers

Many flowering plants sprout and grow rapidly, and they provide the added benefit of splashes of color for your yard. Sweet alyssum, celosia, cornflower or bachelor button, marigold and cosmos sprout within five to seven days. Zinnias, sunflowers and morning glories bring even more color and quick growth, while fast-growing nasturtiums multitask as garden beauties that you can add to salads or as dinner-plate garnishes.

Perennial Flowers

Dianthus (Dianthus chinensis) will add to your garden year after year, while black-eyed Susan (Rudbeckia hirta) and Sweet William (Dianthus barbatus) are biennial or perennial plants, depending on the varieties you select. These flowery plants will germinate in five to 10 days and grow quickly after sprouting. Other perennial choices include blackberry lily (Belamcanda chinensis), blanket flower (Gaillardia x gradiflora), rose campion (Lychnis coronaria) and gaura (Gaura lindheimeri). All of these perennials are hardy in United States Department of Agriculture plant hardiness zones 3 through 8, while many thrive through zone 10.


Not only do many herbs germinate and grow quickly, they add fragrance to the garden and flavor to your menu. Consider basil, which sprouts in about four days, or chives, cilantro and dill, which make their appearance seven to 14 days after planting. Mint grows quickly, as well, but you’ll probably want to plant it in containers to keep it from invading other areas. Garden cress adds a sharp aroma and a peppery taste to dishes.


Several vegetables grow very quickly, including most types of lettuce and radishes. Cucumbers germinate within seven to 10 days, as well, and mustard greens, spinach, scallions and turnips hold their own in the race. Blue Lake and Pencil Wax bean varieties are especially suitable for quick gardening, and cucumbers, squash, cantaloupe and watermelon, with their four- to six-day germination period make excellent garden additions.

Miscellaneous Plants

Noted in Thomas Jefferson’s garden journal as early as 1812, hyacinth bean vines can grow 6 to 20 inches in a single season, twining through the garden, their maroon seedpods and purple flowers bringing tropical drama to the landscape. Grasses, especially wheat grass and rye, also grow quickly. Add a little fun by growing grass in a hollowed potato decorated with craft wiggle eyes, so that it seems to grow green hair.

  • KidsGardening: Fast-Germinating Seeds
  • Fine Gardening: Five Fast-Growing Perennials That Flower Their First Year From Seed
  • Los Angeles Times: Plant Radish Seeds and Watch Them Grow Fast
  • Urban Farmer Seeds: Quick Growing Vegetables — Urban Farmer’s Guide
  • Purdue University Cooperative Extension Service: Starting Seeds Indoors
  • National Gardening Association: How to Grow Herbs From Seed
  • Mother Earth News: 12 Best Kitchen Herbs

Pamela Martin has been writing since 1979. She has written newsletter articles and curricula-related materials. She also writes about teaching and crafts. Martin was an American Society of Newspaper Editors High School Journalism Fellow. She holds a Bachelor of Arts in Teaching in elementary education from Sam Houston State University and a Master of Arts in curriculum/instruction from the University of Missouri.

What Plants Grow the Fastest From Seeds?. For many gardeners, waiting for seeds to germinate and plants to grow is part of the hobby’s reward. For others, however, it can be maddening, especially if you are gardening with children. Distract impatient growers with fast-growing plants while they wait for the rest of …

9 Vegetables That Grow Quickly

These are the fastest growing vegetables for impatient gardeners.

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The Spruce / Autumn Wood

When you’re starting an edible garden, it can be difficult to wait for your homegrown bounty to be ready for harvest. Produce such as tomatoes and peppers are notorious for long growing seasons.

The solution: Plant some fast-growing vegetables to tide you over while you’re waiting for the rest of your crops. If you sow a few seeds every other week, you’ll have a continuous supply of fresh produce from your garden all summer long. Here are nine plants that you can start early in the growing season, then get ready to harvest your vegetables in about eight weeks.

Arugula (‘Eruca vesicaria ssp. sativa’)

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The Spruce / K. Dave

Arugula has a slightly peppery flavor that makes it delicious in a salad or as an alternative to basil pesto. Arugula is also sometimes called rocket—not because of how quickly it grows, but because the name is derived from the Italian word for the green, ruchetta.

Sow the seeds directly in the ground, and cut the leaves when they’re ready to harvest. Because its roots are relatively shallow, arugula can also be grown in container gardens.

After planting the seeds, seedlings should emerge between 7 to 14 days. The arugula will be fully grown and ready to harvest in about three to four weeks. The earlier you harvest the leaves, the more tender and sweet the arugula will be.

  • Sun Exposure: Full sun, part-shade
  • Soil Needs: Humus-rich, well-drained

If you continue to grow arugula through the summer months, try growing it in a shadier spot, to prevent it from going to seed too quickly.

Bok Choy (‘Brassica rapa subsp. chinensis’)

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Deidre Malfatto / Stocksy

Another quick-growing vegetable, bok choy (also known as pak choi) is a type of Chinese cabbage. There are two varieties you can grow: baby bok choy, which is less than 10 inches tall, and standard bok choy, which grows 1 to 2 feet tall.

Plant your bok choy in partial shade for best results, though it can handle full sun. Water it consistently, as drought causes the plant to bolt. Depending on the variety that you’re growing, as well as the weather, your bok choy will be ready to harvest in around 45 to 60 days.

  • Sun Exposure: Partial shade
  • Soil Needs: Rich, well-draining

Broccoli Rabe (‘Brassica ruvo’)

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Kimbra Ritchie / Getty Images

Also called broccoli raab or rapini, rabe resembles broccoli; however, it is actually more closely related to turnips. It has a somewhat bitter taste.

The vegetable, which grows best in full sun, will be ready to harvest in 50 to 60 days. The trick with broccoli rabe is to harvest the clusters as soon as they appear because they will open to flower fast. The leaves and stems of broccoli rabe are also edible and taste best if harvested young.

  • Sun Exposure: Full sun
  • Soil Needs: Nutrient-rich, neutral pH

Cress (‘Lepidium sativum’)

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The Spruce / K. Dave

Cress is another unique green that is popular thanks to its peppery flavor and ease of growing. It’s often grown throughout the winter as a delicious year-round microgreen. It’s best to grow cress in a shallow tray that’s lined with wet paper towels. Sprinkle the seeds over the surface and cover the tray with plastic wrap.

The cress will germinate within a couple of days. Harvest as soon as leaves are about 2 inches in size. You can sow successively each week for continual harvest, but if you’re growing outside, you may find the peppery taste gets too strong when the weather turns hot.

  • Sun Exposure: Full sun, partial shade
  • Soil Needs: No soil needed

Kale (‘Brassica oleracea var. sabellica’)

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The Spruce / Debbie Wolfe

Kale is one of the most cold-tolerant plants on this list of fast-growing vegetables. In some gardening zones it can be grown almost year-round. Spring-planted kale often takes a little bit longer to mature than kale grown in the late summer or early fall.

Kale is easy to start directly outdoors, but it needs plenty of water, as drought will make it bitter. Harvest leaves from the outside of the bunch when they’re large enough to eat, and continue to let the plant produce for several weeks.

  • Sun Exposure: Full sun, partial shade
  • Soil Needs: Loamy

Mustard Greens (‘Brassica juncea’)

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The Spruce / K. Dave

Mustard greens also have to be kept well-watered, as they will turn unpleasantly bitter if allowed to dry out. Although it’s not as cold-hardy as kale, it can tolerate a light frost.

Like lettuces and other greens, mustard greens are sensitive to heat and do best in early spring and after mid-summer, or when given some shade during the hottest times of the year. Harvest the mustard greens when the leaves are large enough to eat.

  • Sun Exposure: Full sun, partial shade
  • Soil Needs: Sandy, clay, well-drained, moist

Radishes (‘Raphanus sativus’)

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The Spruce / K. Dave

Truly one of the fastest-growing vegetables to tuck into your garden, radishes are a must-try. They are perfect for kids’ gardens because of how quickly they grow. They can be harvested as quickly as three weeks after planting. Try planting heirloom radishes ​for unique colors, shapes, and flavors.

Thin seedlings once they’ve sprouted so the roots can grow without constraint. Don’t bother trying to start radishes indoors either––just sprinkle the seeds outdoors where you want them.

  • Sun Exposure: Full sun
  • Soil Needs: Loamy, sandy

Turnips (‘Brassica rapa subsp. rapa’)

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Sean Locke / Stocksy

Turnips are an old-fashioned vegetable that provides a great harvest for the home gardener. Both the leaves and the roots can be eaten, although not every variety excels at both simultaneously.

Turnips are one of the least fussy plants on this list when it comes to temperature conditions, and can be planted through the entire growing season in many gardening zones. Pick roots when they are tender––at around 2–3 inches in circumference––and harvest leaves when they are young.

  • Sun Exposure: Full sun
  • Soil Needs: Loamy, sandy, slightly acidic to neutral

Spinach (‘Spinacia oleracea’)

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The Spruce / K. Dave

Spinach is a nutritious vegetable that grows quickly in cool weather. Plant it in full sun or partial shade, and it will be ready to harvest within four to six weeks.

Spinach can be harvested multiple times in the “cut and come again” method. Cut the individual older leaves and let the younger inner leaves continue to grow for a later harvest. If you cut the leaves at about an inch above the base, the plant may send out a new batch of leaves for you to harvest at a later date.

  • Sun Exposure: Full sun
  • Soil Needs: Loamy, neutral

The vegetables listed above are all considered cool season crops. They may require cool soil temperatures in order to germinate and cooler weather in order to develop the best flavor. You can sow most of these continuously throughout the season although you may need to refrigerate seeds for a few days in order to germinate seed when the ground warms up. Many will also benefit from some afternoon shade to prevent early bolting; going to seed.

These nine best vegetables are all harvestable within 8 weeks of planting. Sow a few seeds every other week for a continual stream of fresh produce.