Planting Walla Walla Onions: Things You Need to Know

For those of you who have never heard of them, Walla Walla onions are sweet onion that is grown in the Walla Walla Valley in Washington state. They are one of the most popular onions to plant, and for good reason! They are incredibly easy to grow, and they produce a large number of onions per plant.

Plus, they have a great flavor that is perfect for cooking or eating raw. If you are looking for an onion that is both easy to grow and delicious, then you should definitely consider planting some Walla Wallas!

When you plant your Walla Walla onion sets, be sure to space them about 4 inches apart in rows that are 18 inches apart. The soil should be loose and well-drained, and the area should get full sun. You can fertilize before planting, but it’s not necessary.

Just be sure to keep the soil moist throughout the growing season. To harvest your onions, wait until the tops begin to fall over, then pull them up by the roots and brush off any dirt. Cut off the green tops, leaving about an inch of stem attached to each onion.

Store your onions in a cool, dry place for up to 6 months.

When Should Walla Walla Onions Be Planted?

Walla Walla onions are a type of onion that is best suited for growing in the spring. They should be planted as soon as the ground can be worked in the spring, which is typically around late March or early April in most parts of the country. Walla Walla onions are usually started from seed, although transplants can also be used.

If starting from seed, sow the seeds indoors about 6-8 weeks before your last frost date. Plant the seeds ¼ inch deep in soil that has been moistened. Keep the soil moist but not wet and place the seedlings under grow lights or in a sunny window until they are ready to transplant outdoors.

When transplanting, space the plants 8-10 inches apart in rows that are 12-18 inches apart. Set them so that the roots are buried and just the green tops are showing above ground. Firmly press down on the soil around each plant to make sure there are no air pockets.

Water well after planting and keep an eye on moisture levels throughout the season, watering as needed to keep things evenly moist but not soggy. Fertilize your Walla Wallas when you first plant them and then again about 4 weeks later using a balanced fertilizer such as 10-10-10. Stop fertilizing once fruits start to form so that all of their energy goes into developing large bulbs rather than foliage growth.

Harvest Walla Wallas when their necks have flattened out and their skins have turned golden brown in color. This typically occurs around late August or early September depending on your climate and when they were planted.

How Long Does It Take Walla Walla Onions to Grow?

Onions are a cool-season crop and can be planted as soon as the ground can be worked in the spring. They can also be planted in late summer for a fall crop. Walla Walla onions are ready to harvest about 110 days after planting.

What Month Do You Plant Onions?

Onions are a cool season crop, which means they can tolerate frost and can be planted as early as February in some parts of the country. In general, onions are usually planted between March and May.

When Should I Plant Walla Walla Seeds?

If you want to grow Walla Walla onions from seed, the best time to plant them is in late winter or early spring. You can start seeds indoors about four weeks before your last expected frost date. Sow the seeds ½ inch deep in moistened potting mix and keep them warm (around 70°F).

Once they germinate and grow a few inches tall, thin out the seedlings so that only the strongest one remains in each pot. When it’s time to transplant your seedlings outdoors, wait until all danger of frost has passed. Onions are cold hardy, but they prefer soil that’s warm enough to encourage root growth.

If you planted your seeds too early and nighttime temperatures are still dipping below 50°F, give your seedlings a little extra protection by covering them with row covers or plastic tunnels. Set transplants 6 to 8 inches apart in rows that are 12 to 18 inches apart. Gently loosen the roots before planting so they can spread out easily in their new home.

Firm the soil around each onion so that it makes good contact with the roots. Water well immediately after planting, then keep an eye on moisture levels and water as needed to keep the soil evenly moist (but not soggy) throughout the growing season.

How to Grow Walla Walla Onions in Containers

Walla Walla onions are a great addition to any garden, and they’re especially well-suited for growing in containers. Here’s what you need to know to get started: First, choose a container that’s at least 12 inches deep and has drainage holes.

Fill it with a high-quality potting mix, and place your onion bulb so the root end is pointing down. Water well. Next, place your container in a sunny spot outdoors.

Keep the soil moist but not soggy, and fertilize every few weeks with an all-purpose fertilizer. As your onion grows, keep an eye out for pests like aphids or whiteflies. If you see any, blast them off with a strong stream of water from the hose or use an insecticidal soap to control them organically.

Harvest time! When your onions are about 4-6 inches in diameter (depending on the variety), it’s time to harvest them. Cut the greens back to about 1 inch above the bulb, then carefully lift your onion out of the container.

Brush off any excess dirt and enjoy!

Can You Plant Walla Walla Onions in the Fall

Walla Walla onions are a type of onion that is typically planted in the spring. However, you can also plant them in the fall. This is because they are long-day onions, which means that they need 14 to 16 hours of daylight in order to form bulbs.

In the northern hemisphere, this means that they should be planted from late March to early May. However, if you live in the southern hemisphere, you can plant them from September to November. When planting Walla Walla onions in the fall, it is important to make sure that the soil temperature is above 60 degrees Fahrenheit.

If it is too cold, the onions will not germinate. You should also make sure that there is at least six weeks of frost-free weather before the first frost date in your area. Otherwise, the onions will not have enough time to mature before winter sets in.

If you live in an area with mild winters, you can leave your Walla Wallas in the ground and they will overwinter just fine. However, if you live somewhere with harsher winters, you will need to dig them up and store them indoors over winter. To do this, cure them for two weeks after harvesting by leaving them out in the sun or heat until their necks start to dry and papery.

Then cut off the tops and roots and store them in a cool (32-40 degree), dark place like a basement or garage until spring arrives.

How Deep to Plant Walla Walla Onions

Onions are a staple in many kitchens across the globe. They add flavor to dishes and can be used in a variety of recipes. Walla Walla onions are a type of onion that is grown in Washington state in the United States.

These onions are known for their sweet taste and large size. When planting Walla Walla onions, it is important to plant them at the correct depth. If you plant your Walla Wallas too shallow, they will dry out and may not form bulbs.

If you plant them too deeply, they may not get enough sunlight and also may not form bulbs. The ideal depth to plant your Walla Wallas is about two inches below the soil surface. Be sure to loosen the soil before planting so that the roots can easily spread out.

Water your newly planted onions regularly and give them plenty of sunshine. In about 100 days, you should be able to harvest your own fresh, home-grownWalla Wallas!

How to Cure Walla Walla Onions

If you’re a fan of Walla Walla onions, you know that they’re notoriously difficult to keep fresh. But did you know that there’s a cure for that? With just a few simple steps, you can keep your Walla Wallas fresh and crunchy for weeks on end.

Here’s how: 1. Start with fresh onions. This may seem obvious, but it’s the most important step.

Make sure to choose firm, brightly-colored onions with no signs of bruising or decay. 2. Cut off the root end and the green top of the onion, leaving about an inch of the onion intact. 3. Place the onion in a jar or container with the root end down and cover it with cold water.

The colder the better – I like to use ice water. 4. Let the onion sit in the ice water for at least 30 minutes, or up to 12 hours if you have the time. This will help to crisp up the flesh of the onion.

Transplanting Walla Walla Onions

If you’re planning on transplanting Walla Walla onions, there are a few things you need to know. First, make sure the onion plants are at least 4-6 weeks old before transplanting them into your garden. You’ll also need to harden off the plants for 7-10 days before planting them outside.

When transplanting, be sure to dig a hole that’s twice as wide as the root ball of the onion plant. Gently remove the plant from its pot, and then carefully place it in the hole so that the roots are spread out evenly. Once planted, water well and keep the soil moist until the plants are established.

With proper care, your Walla Walla onions will thrive and provide you with a bountiful harvest come summertime!

Are Walla Walla Onions Long Day

Walla Walla onions are long-day onions, meaning that they need 14-16 hours of daylight in order to form bulbs. They are best suited for growing in the northern United States and southern Canada, where the days are the longest during the summer months. Walla Wallas is large onions, with a mild flavor that makes them perfect for eating raw or cooked.

If you’re looking for an onion that will keep its shape and not turn mushy when cooked, Walla Wallas is a good choice.

Walla Walla Onion Seeds

If you’re a fan of onions, then you’ll be happy to know that you can grow your own at home with Walla Walla onion seeds. This type of onion is a sweet onion that is named after the city of Walla Walla, Washington, where it was first grown. The best thing about growing your own onions is that you can control the amount of sweetness by how much you water them.

If you want a sweeter onion, then water it more often. For a less sweet onion, let the soil dry out more between watering. To get started, plant your seeds in well-drained soil in early spring.

Once they’ve germinated and grown to about 4 inches tall, thin them out so that there’s only one seedling per pot or per foot of row. Keep the soil moist and fertilize regularly according to package directions. In late summer or early fall, when the tops of the onions start to fall over, stop watering them and allow the soil to dry out completely.

This will cause the onions to start storing up their sugars for winter storage. Once they’re fully dried (usually after about two weeks), cut off the tops and store them in a cool, dark place until springtime planting season rolls around again!

Growing Walla Walla Onions from Seed Indoors

If you’re planning on growing Walla Walla onions from seed, it’s best to start them indoors about 8 weeks before the last frost date in your area. Walla Wallas is large onions, so you’ll need to use a deep pot and plant the seeds about 1/2″ deep. Keep the soil moist but not soggy, and fertilize every 2-3 weeks with a balanced fertilizer.

When the seedlings are 4-6 inches tall, they can be transplanted outdoors into well-drained soil in full sun. Space the plants about 6 inches apart, and keep them watered during dry spells. Harvest your Walla Wallas when the tops begin to fall over and turn brown – usually around late summer or early fall.


If you’re looking for a delicious and easy-to-grow onion, look no further than the Walla Walla onion. This sweet onion is perfect for salads, sandwiches, and burgers. And best of all, they’re a snap to grow!

Here’s everything you need to know about planting Walla Wallas. Walla Walla onions are best planted in the spring, as soon as the soil can be worked. They’ll need full sun and well-drained soil.

To ensure good drainage, mix in some sand or compost before planting. When it comes to spacing, give your onions plenty of room to grow. Plant them about 6 inches apart in rows that are at least 18 inches apart.

Once they start growing, thin them out so that the strongest plants are about 12 inches apart. Water your onions regularly during the growing season. They’ll need 1-2 inches of water per week, depending on rainfall amounts.

Don’t let them dry out completely or they’ll start to bulb up too early. Fertilize your onions every few weeks with a balanced fertilizer like 10-10-10. This will help them stay strong and produce lots of bulbs come harvest time.

Harvest your Walla Wallas when the tops start falling over and turning yellowish brown.

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