Celery in Zone 3B — Great Plains

Growing your own celery in the Great Plains might seem like a challenge, but the crisp, fresh flavor is worth the effort. Imagine adding homegrown celery to soups, salads, or just enjoying it as a crunchy snack – a flavor far superior to anything you'll find at the store. Plus, there's a unique satisfaction in coaxing such a water-loving plant to thrive in our climate.

We know our region has its quirks: extreme temperature swings, variable rainfall, and the ever-present wind. But with careful timing and attention to watering, you can definitely grow celery here. Our 118-day growing season is just enough if you plan accordingly.

Starting celery indoors is the way to go here in the Great Plains. You'll want to sow those tiny seeds early to late March – about 10 weeks before you plan to transplant them outside. Celery needs a long head start to mature in our shorter growing season.

Use seed trays and a good seed-starting mix. Celery seeds need light to germinate, so don't bury them too deeply; just press them gently into the surface. Keep the soil consistently moist, and consider bottom watering to prevent damping off. You can set up a simple system using a tray and a wicking material. Since spring weather in the Plains can be unpredictable, make sure your seedlings have a warm and bright spot, ideally with supplemental grow lights.

Transplant your celery seedlings outdoors mid May through early June, once the risk of frost has passed. Before planting, harden off your seedlings by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the stronger sun and wind we often experience.

Plant your celery seedlings 8-10 inches apart in a spot that gets full sun to partial shade. Remember, even though it's getting warmer, a late frost is always possible, so keep an eye on the forecast. Wind protection is also essential for these delicate plants.

Celery is a thirsty plant, and consistent watering is the key to success here in the Great Plains. With our hot summers and low-to-moderate humidity, you'll need to stay on top of it. Aim to keep the soil consistently moist, but not waterlogged.

During the peak of summer, that might mean watering deeply every other day, or even daily if rainfall is scarce. Use the "finger test" – stick your finger about 2 inches into the soil. If it feels dry, it's time to water. As a general guideline, aim for about 1-2 inches of water per week, either from rainfall or irrigation. Water at the base of the plants to avoid wetting the foliage, which can encourage fungal diseases in our sometimes humid conditions.

Pay attention to your plants. If the leaves start to wilt or turn yellow, that's a sign of underwatering. If the leaves are yellowing and the plant seems stunted, you might be overwatering. A good layer of mulch, like straw or shredded bark, can help retain moisture and regulate soil temperature.

You can expect your first celery harvest mid August through late September, about 85 days after transplanting. Look for stalks that are at least 8 inches tall; you can harvest individual outer stalks as needed. If you prefer, you can cut the entire plant at the base once the stalks are 12 inches or taller.

For a milder flavor, try blanching the stalks by mounding soil around them a week or two before harvest. This excludes light and reduces bitterness. Continue harvesting as needed, but keep an eye on the calendar. With our first frost typically arriving mid- September, you might want to harvest the entire plant before then, even if it's not fully mature.

Here are the top 3 problems you might face with celery in the Great Plains:

Bolting from Temperature Stress

• What it looks like: The celery plant prematurely sends up a flower stalk, making the stalks bitter and tough.
• What causes it: Temperature fluctuations, especially early in the season, can stress the plant and trigger bolting. This is common with our extreme temperature swings.
• How to fix/prevent it: Choose bolt-resistant varieties. Use row covers or shade cloth during periods of extreme temperature changes. Consistent watering also helps prevent stress.

Hollow Stalks

• What it looks like: The celery stalks develop a hollow center.
• What causes it: Inconsistent watering and nutrient deficiencies. Celery needs a steady supply of moisture to develop properly.
• How to fix/prevent it: Consistent watering is key. Make sure the soil is consistently moist. Amend your soil with compost before planting, and consider side-dressing with a balanced fertilizer during the growing season.

Stringy Stalks from Heat

• What it looks like: The celery stalks become tough and stringy, making them less palatable.
• What causes it: Prolonged exposure to high temperatures. Our hot Plains summers can cause this problem.
• How to fix/prevent it: Provide afternoon shade during the hottest part of the day. Consistent watering helps, as does mulching to keep the soil cool. Choose heat-tolerant varieties.

Great Plains Specific Challenges: Celery's high water needs can be tough in our region, especially with our variable rainfall and tendency towards drought. Monitoring soil moisture closely and providing supplemental water when needed is crucial. The combination of hot heat and low-to-moderate humidity can also stress the plants, so providing some shade and wind protection can make a big difference.

Companion planting can help your celery thrive in the Great Plains.

• Good companions:
• Green beans: They fix nitrogen in the soil, which benefits celery.
• Cabbage: It deters some celery pests.
• Tomatoes: Their scent repels celery whitefly.
• Onions: The strong scent deters celery fly.
• Bad companions:
• Carrots: They compete for the same nutrients and can attract the same pests.