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Plant Database / Onion / Walla Walla Sweet care

Onion 'Walla Walla Sweet'

Allium cepa var. cepa

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'Walla Walla Sweet' is a Onion variety in the Allium genus with a scientific name of Allium cepa var. cepa. Walla Walla Sweet is a heirloom variety.

Walla walla onions are a very sweet, large round golden-skinned variety. Great freshly sliced raw on pizzas and salads. Long day type, with a short shelf life. Firm texture. Very cold hardy with large yields. Has quite low disease resistance. Walla walla has yellow / light brown skin, with white flesh.

Walla Walla Sweet grows as a Perennial and is a Vegetable. Being a Perennial, it tends to grow best over several years (approx 3 years and greater). Walla Walla Sweet is known for growing to a height of approximately 45.0 cm (that's 1.46 feet in imperial).

France is believed to be where Walla Walla Sweet originates from.

Walla Walla Sweet Onion is normally quite a low maintenance plant and is normally very easy to grow - great for beginner gardeners!

This plant info is provided by the myfolia gardener's wiki. All details about Onion 'Walla Walla Sweet' have been kindly provided by our members.

How to grow Onion 'Walla Walla Sweet'

Full Sun
+
Medium

Plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Walla Walla Sweet is thought of as very hardy, so this plant will tend to survive through freezing conditions. USDA Hardiness Zone 3 to 10 are typically the USDA Hardiness Zones that are appropriate for this plant (although this can vary based on your microclimate). Try to keep the ph of your soil between the range of 6.0 and 7.0 as Walla Walla Sweet likes to be in weakly acidic soil - neutral soil.

Growing Walla Walla Sweet from seed

Try to aim for a seed spacing of at least 1.95 inches (5.0 cm) and sow at a depth of around 0.98 inches (2.5 cm). Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.

By our calculations, you should look at sowing Walla Walla Sweet about 28 days before your last frost date.

Transplanting Walla Walla Sweet

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Walla Walla Sweet is a very hardy plant.

Harvesting Walla Walla Sweet

This variety tends to be ready for harvesting by early autumn.

Onion 'Walla Walla Sweet' information

Lifecycle The lifecycle that Walla Walla Sweet exhibits. Perennial Category The category for the Walla Walla Sweet plant. Vegetable
Hardiness Is Walla Walla Sweet frost hardy? Very Hardy Country of Origin Where does Walla Walla Sweet come from? France
Bloom Time When does Walla Walla Sweet bloom? N/A Harvest Time When is Walla Walla Sweet ready for harvest? Early Autumn
Mature Height How tall does Walla Walla Sweet grow? 45.0 cm / 1.46 feet
USDA Zone Range What zones does Walla Walla Sweet grow best in? Zone 3 - Zone 10 pH Range The level of acidity for Walla Walla Sweet. 6.0 - 7.0
Sun How much sunlight does Walla Walla Sweet need to grow? Full Sun
Water Requirements How much water does Walla Walla Sweet require? Medium Nitrogen Requirements How much nitrogen fertiliser does Walla Walla Sweet need? Low
Ideal Germination Temperature Range What temperatures does Walla Walla Sweet need in order to germinate? 13°C / 55°F to 35°C / 95°F Growing Temperatures What temperatures are best to grow Walla Walla Sweet in? Help build our wiki! to Help build our wiki!
Can Sow Direct? Can Walla Walla Sweet seeds be sown directly? Yes Sowing Depth How deep to plant Walla Walla Sweet? 2.5 cm / 0.98 inches
Sowing Distance Apart How far apart to sow Walla Walla Sweet 5.0 cm / 1.95 inches
Edible? Is Walla Walla Sweet edible? edible

How long does Walla Walla Sweet take to grow?

These estimates for how long Onion 'Walla Walla Sweet' takes to sprout, grow and harvest are from real observations from real gardeners, right around the world. Start logging and journaling your observations to participate!

Days to Germination How long does it take Walla Walla Sweet to germinate? 6 days Average 6 days | Min 5 days | Max 9 days (5)
Days to Transplant How long until I can plant out Walla Walla Sweet? + 38 days Average 38 days | Min 38 days | Max 38 days (1)
Days to Maturity How long until Walla Walla Sweet is ready for harvest / bloom? + 115 days Average 115 days | Min 529 days | Max 529 days (1)
Total Growing Days How long does it take to grow Walla Walla Sweet? = 159 days

When should I sow Walla Walla Sweet?

Folia's when to plant Onion 'Walla Walla Sweet' estimates are relative to your last frost date. Enter your frost dates and we'll calculate your sowing and planting dates for you!

Onion Walla Walla Sweet Etymology

The Walla Walla sweet onion is named for Walla Walla county (Washington, USA) where the variety originated in the early 1900’s.¹

Footnotes

¹ http://en.wikipedia.org/wiki/Sweet_onion

Popular varieties of Onion

View the complete variety list for Onion »

Walla Walla Sweet Onion Tags

large round sweet golden long day

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