Concurrency

Family: Apiaceae Vegetable

Planting Schedule

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Fragrant, crisp stalks with a clean, bright snap—Concurrency celery grows into a dense, upright clump that feels as refreshing as it tastes.

The flavor is pleasantly mild and distinctly celery-forward, with a tender, stringless texture that stays crisp from garden to table. Ideal for fresh use and for stir-ins, soups, and savory sauces where its aromatic character shines.

Light: Part SunMaturity: 75 DaysHabit: Upright

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Concurrency Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Protected Environment Only
Zone 1b	Protected Environment Only
Zone 2a	Mar 30th	May 18th	Aug 1st – Aug 29th
Zone 2b	Mar 20th	May 8th	Jul 22nd – Aug 25th
Zone 3a	Mar 20th	May 8th	Jul 22nd – Sep 1st
Zone 3b	Mar 24th	May 12th	Jul 26th – Sep 21st
Zone 4a	Mar 20th	May 8th	Jul 22nd – Sep 24th
Zone 4b	Mar 18th	May 6th	Jul 20th – Sep 27th
Zone 5a	Mar 13th	May 1st	Jul 15th – Sep 30th
Zone 5b	Mar 9th	Apr 27th	Jul 11th – Oct 5th
Zone 6a	Mar 6th	Apr 24th	Jul 8th – Oct 10th
Zone 6b	Feb 28th	Apr 18th	Jul 2nd – Oct 16th
Zone 7a	Feb 23rd	Apr 13th	Jun 27th – Oct 20th
Zone 7b	Feb 13th	Apr 3rd	Jun 17th – Oct 28th
Zone 8a	Feb 4th	Mar 25th	Jun 8th – Nov 5th
Zone 8b	Jan 26th	Mar 16th	May 30th – Nov 12th
Zone 9a	Jan 9th	Feb 27th	May 13th – Nov 26th
Zone 9b	Dec 15th	Feb 2nd	Apr 18th – Dec 9th
Zone 10a	—	Oct 1st	Dec 15th – Feb 28th
Zone 10b	—	Oct 1st	Dec 15th – Feb 28th
Zone 11a	—	Oct 1st	Dec 15th – Feb 28th
Zone 11b	—	Oct 1st	Dec 15th – Feb 28th
Zone 12a	—	Oct 1st	Dec 15th – Feb 28th
Zone 12b	—	Oct 1st	Dec 15th – Feb 28th
Zone 13a	—	Oct 1st	Dec 15th – Feb 28th
Zone 13b	—	Oct 1st	Dec 15th – Feb 28th

Crop Details

Trait	Value
Days to Maturity	75
Sun Requirements	Part Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	45
Min Night Temp (°F)	35
Harden Off (days)	7

Culinary Notes

Chef's Note

Concurrency celery is built for crunch—dense, upright stalks that stay stringless so they don’t turn fibrous in heat. Use it early for aroma and texture: it holds a bright snap in stir-fries and disappears beautifully into stock-borne soups without getting bitter.

Best Uses

raw snacking sticks with lemony salt
chopped for stir-fries and quick sautés where it should stay crisp
stock, soups, and braises where the aroma threads through the broth
creamy riffs like celery-mustard purée or blended soup for a silky texture

Flavor Profile

clean, celery-forward aromatics bright, lightly salty snap mild sweetness tender, stringless crunch

Kitchen Pairings

garlic black pepper butter lemon parmesan chicken

Frequently Asked Questions

Why are my sweet celery plants developing dark, water-soaked stems or leaves, and what can I do about it?

This is often early blight/leaf spot complex or bacterial soft rots common in Apiaceae when foliage stays wet and air flow is poor. Remove affected leaves, avoid overhead watering, and water at the soil line in the morning so leaves dry quickly. Keep plants spaced for airflow and consider a labeled copper-based fungicide if spots are spreading.

How often should I water sweet celery (Apium graveolens var. dulce) during its main growth to prevent problems?

During active growth, keep the soil consistently moist—aim for evenly damp not soggy—because celery roots dry out quickly. Water about 1–2 times per week depending on heat, with enough depth to wet the root zone; check by feeling the soil 1–2 inches down. If the soil dries between waterings, celery can become stringy and the plant may bolt or stall.

How do I tell when sweet celery is ready to harvest at about 75 days?

Harvest when stalks are firm, crisp, and reach their expected size for your variety, typically around day 75. Look for full-height stalks with tight, upright centers and leaves that are green and healthy rather than floppy. For best eating quality, harvest in the morning and cut stalks at the base or harvest outer stalks first to keep the plant producing.