20 Fast-Growing Vegetables (Spring or Fall)

Twitter Facebook Pinterest Email

There are plenty of delicious fast-growing vegetables you can grow in the cooler months of spring and fall. Most of the suggestions on this list are mature in just six weeks.

For more fall garden tips, also see, 25 Flower Seeds to Sow in Fall and 20 Flowering Bulbs to Plant in Fall.

Fast Growers for Cooler Weather

If you have been here before you know I love cool weather gardening. Free of the intense heat and humidity of summer, it’s a beautiful time to be outside and the conditions are ideal for many cool-loving veggies.

Spring and fall are the time for growing nutrient-dense, leafy greens, and, if you have never been particularly fond of them, it is time to give them another try. I know we hear this all the time but it’s true: nothing compares to the flavour and juiciness of freshly-picked spinach and leafy greens! That limp, lifeless stuff in the grocery store shouldn’t even be sold as food!

All the veggies on the list (below) have edible stalks and leaves which makes them ready to pick at any point in the growth cycle. The estimated harvest day is simply marks a point where growth may be at a maximum. Plus, many of these varieties are ‘cut and come again’, meaning, you can trim off leaves for your dinner salad, leaving an inch at the base, and new leaves will grow—sometimes several times over. Bonus!

You can start sowing cool-tolerant crops when your garden soil temperature is consistently 50 to 68 °F | 10 to 20° C.

Have onions stored in your kitchen sprouted? See how to regrow them.

Know Your Hardiness Zone

While this is probably not a concern for short-term veggie crops, if you are a beginner gardener, the first step is to know your gardening zone (for plant hardiness) and learn which plants are best for your growing conditions and climate. Invasive species (plants and animals) are huge problem these days and it is critical that gardeners are making safe choices that benefit the environment.

How to Find Your Frost Dates and Hardiness Zone

Frost Dates Calculator | This calculator at Almanac.com is simple to use. Enter your city and state or province to find your first and last frost dates and number of frost-free days.
Plant Hardiness Zone | United States and Canada
Plant hardiness zones are listed on seed packets and plant tags.

Growing zones are usually displayed on plant packages, tags, and seed packets to assist your buying decisions.

To learn more about local conservation authorities and endangered and invasive species, see Handy Online Resources for Gardeners.

If you would like to print out the entire list for your garden notebook, you can get it here:

What is an ebook or downloadable file?

Downloadable files and ebooks are documents (files) you read on your computer, tablet, or mobile phone.
The files and ebooks offered on this site are in PDF format.
This means you use Adobe Reader to read it. Adobe Reader may already be on your device or you can download it free here.
Once you have Adobe Reader, click on the Add to Cart button, and follow the prompts on the screen.

20 Quick-Growing Veggies

Growth rates vary greatly with each variety so check your seed packet for specific info.

The key is warm soil temperatures for optimum seed germination.

For cool-tolerant crops, in general, the seed sowing soil temperature range is 50 to 68 °F | 10 to 20° C.

Covers including cold frames, cloches, polytunnels, or frost cloths will help prevent damage from cold and frost.

Arugula | Rocket | 20-40 days
Beets | 40-70 days | tops and roots
Broccoli Raab/Rapini/Rabi | 40-60 days| leaves and tops are edible
Endive | 35-50 days
Kale | 30-65 days | the baby greens are much more tender than mature kale
Kohlrabi | 40-50 days
Leaf lettuce | 40-60 days
Mache/ Cornsalad | 45-50 days
Mesclun Greens | 30-45 days – this is my favorite variety pack and often comes with 6-10 different seed types.
Mibuna | 21-40 days
Mizuna | 35-45 days
Mustard | 21-45 days
Onion greens | 40-50 days | grow micro-onion greens, baby bulbs, or onion stalks
Pak Choi | 40-55 days
Peas | 50-60 days | pea shoots are sweet and delicious!
Radishes | 21-30 days | Radish tops are mild and add nice flavor to salads
Spinach | 30-55 days
Swiss Chard | 30-60 days
Tatsoi | 21-45 days
Turnips | 35-50 days | Leaves and root are edible

Seed Shop

I have linked to examples of these seeds in Amazon so you can see them, but I strongly recommend finding a good, reliable, local seller for seeds proven to succeed in your climate and growing conditions. Plus, you can benefit from their experience and expertise.

Click any of these images to see them on Amazon

Spring/Fall Veggie Seed Shop

Sowing Tips

Order your seeds right away to you have them right when needed. Timing is important.
Read all of the seed packets for sowing tips.
In fall, sow at least six weeks before first expected frost.
In spring, sow as soon as soil temperature is favorable (this has more on soil temperatures).
Cool-tolerant veggie seeds need temperatures of 50 to 68 °F | 10 to 20° C to germinate.
Note any special sowing instructions (e.g. pea seeds can be pre-soaked in water to encourage germination).
For continuous harvests, sow the fastest-growing crops every two weeks.
Keep notes in your garden journal tracking sowing dates, conditions, best/worst crops, recommendations for next time, save seed packets, and take photos.
If you love cool weather gardening, consider growing your veggies right through the winter.

Free Printable Checklists

If you would like to save and print the checklists (below), or keep it on your device, use the Add to Cart buttons (below).

These free downloads are in PDF format and can be read on any device with Adobe Reader (free). Watch where the file saves on your device so you know where to find it.