When to Plant Onions in Colorado

First-time gardeners in the Centennial State often wonder when to plant onions in Colorado. If there’s one thing you need to know about Colorado’s cold mountain climate, it’s the fact that onions love it. However, to make sure that you get the harvest that you’ve been hoping for, it’s best to dig deeper and learn more about the right way to plant and grow your onions in Colorado.

When Should I Plant Onions in Colorado?

Expert gardeners recommend planting onion seeds as soon as you can work the soil. If your location is somewhere in Denver, the best time to plant them is in mid- to late March. However, it’s important to note that you can still plant some varieties of onions until late April.

When to Plant Onions in Colorado


How Do You Plant Onion Bulbs?

If you want to grow bulbs for green onions or scallions, all you have to do is to plant them at least 1 to 2 inches deep while making sure that they’re about one to two inches apart. Furthermore, onion bulbs should be planted in rows that are approximately 18 inches apart.

On the other hand, if you’re trying to grow bulbs for traditional onions, make sure that they’re planted about 1 to 2 inches deep and about 5 to 6 inches apart. These bulbs must be planted approximately 1 to 2 feet apart from each other in rows.


Do Onions Need a Lot of Sun?

Keep in mind that onions need full sun exposure in order to thrive. For this reason, it’s best to look for an ideal location where other plants won’t be shading your onions.


How Many Onions Would I Get from One Plant?

Under normal circumstances, only one onion is able to grow from a single bulb. However, this doesn’t mean that you won’t be able to produce lots of onions from one plant.


How Can I Plant Onion Plants?

You can start planting onions from seed or sets of small bulblets. After you start seeds, you transplant them into bigger cells. Before you plant them out, make sure that you put the pots outside for a few days

in order to harden them off.

When you plant them in your garden, make sure that you provide enough space for them to grow – at least 4 to 6 inches apart in a row. The rows must be about 1 to 2 feet apart. Each onion plant must be planted in a small hole that’s about t 1/2-inch deep.

Make sure that you trim their tops to 4 inches after you plant them. Keep in mind that your onion plants would need an inch of water every week. This means that if the weather is dry, you’ll have to water them more.


Should I Give Greenhouse Gardening a Try?

Yes, you should try your hand at greenhouse gardening. Aside from the fact that it allows you to extend your plants’ growing seasons and provide the best growing environment for them, but it also allows you to grow your own food. Let’s dive in and take a closer look at the benefits of setting up your own greenhouse.


It offers you an extended growing season.

A greenhouse traps the sun’s heat and radiation, as well as a reasonable amount of water vapor within the enclosure. For this reason, the warmth and humidity inside the structure stay relatively consistent, regardless of the weather outside. Needless to say, your plants’ growing seasons will extend through the coldest winters.


It provides an ideal growing environment.

Aside from the fact that the greenhouse provides enough warmth and moisture to enhance plant growth, it also protects them from heavy rains, high winds, blizzards, snow, and other harsh weather conditions. What’s more, it also minimizes your plants’ exposure to bugs and vermin that won’t hesitate to destroy all of your gardening efforts.

Moreover, since you have more control of your plants’ growing environment, having a greenhouse provides you with countless opportunities to plant off-season vegetables, fruits, and flowers. You can even grow plants that aren’t native to your area.


You can forget about landscaping.

Those who choose traditional outdoor gardening often find themselves quitting when they encounter landscaping problems. In case you’re wondering, landscaping is far from being easy if you decide to do it on your own. Although enlisting the help of landscaping professionals is the best way to go, it also comes with a price.

With greenhouse gardening, you won’t have to worry about landscaping because greenhouses come in various shapes and sizes. Plus, it’s extremely easy to customize the design of your greenhouse according to your personal preferences.


It allows you to save on grocery expenses.

You’re probably aware that the prices of farm-fresh produce tend to fluctuate due to weather conditions, as well as transportation costs. Having your own greenhouse will allow you to grow your own food and reduce your food bills.

You’ll have more control over your grocery expenses and more control over the types of fruits and vegetables that you want to enjoy all-year-round. Although investing in a greenhouse can be a little pricey, within a year or two, you’ll be able to recoup that cost and then some.


Final Thoughts on When to Plant Onions in Colorado Greenhouses

If you’re serious about taking your gardening experience to the next level, you’d want to figure out when to plant onions in Colorado greenhouses. Based on what we’ve talked about, now’s the best time to go right ahead and do it. Check out Krostrade’s website today to have a look at our wide selection of strong and durable greenhouses that are made of high-quality materials.

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