Keloos

Family: Apiaceae Vegetable

Planting Schedule

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Crisp as fresh-cut rain on stone, Keloos celery forms tall, tightly gathered stalks with a clean, bright snap and a pleasantly mellow, sweet celery flavor.

The texture stays tender and refined through the season, making these stalks especially satisfying for bold, aromatic use in salads, slaws, and savory mixes, as well as for classic pickling and quick flavoring in sauces. Grow Keloos for a garden harvest that feels polished—straight, upright, and consistently crisp at about 90 days.

Light: Part SunMaturity: 90 DaysHabit: Upright

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Keloos 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 16th	May 18th	Aug 16th – Aug 29th
Zone 2b	Mar 6th	May 8th	Aug 6th – Aug 25th
Zone 3a	Mar 6th	May 8th	Aug 6th – Sep 1st
Zone 3b	Mar 10th	May 12th	Aug 10th – Sep 21st
Zone 4a	Mar 6th	May 8th	Aug 6th – Sep 24th
Zone 4b	Mar 4th	May 6th	Aug 4th – Sep 27th
Zone 5a	Feb 27th	May 1st	Jul 30th – Sep 30th
Zone 5b	Feb 23rd	Apr 27th	Jul 26th – Oct 5th
Zone 6a	Feb 20th	Apr 24th	Jul 23rd – Oct 10th
Zone 6b	Feb 14th	Apr 18th	Jul 17th – Oct 16th
Zone 7a	Feb 9th	Apr 13th	Jul 12th – Oct 20th
Zone 7b	Jan 30th	Apr 3rd	Jul 2nd – Oct 28th
Zone 8a	Jan 21st	Mar 25th	Jun 23rd – Nov 5th
Zone 8b	Jan 12th	Mar 16th	Jun 14th – Nov 12th
Zone 9a	Dec 26th	Feb 27th	May 28th – Nov 26th
Zone 9b	Dec 1st	Feb 2nd	May 3rd – Dec 9th
Zone 10a	—	Oct 1st	Dec 30th – Feb 28th
Zone 10b	—	Oct 1st	Dec 30th – Feb 28th
Zone 11a	—	Oct 1st	Dec 30th – Feb 28th
Zone 11b	—	Oct 1st	Dec 30th – Feb 28th
Zone 12a	—	Oct 1st	Dec 30th – Feb 28th
Zone 12b	—	Oct 1st	Dec 30th – Feb 28th
Zone 13a	—	Oct 1st	Dec 30th – Feb 28th
Zone 13b	—	Oct 1st	Dec 30th – Feb 28th

Crop Details

Trait	Value
Days to Maturity	90
Sun Requirements	Part Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	40
Min Night Temp (°F)	28
Harden Off (days)	6

Culinary Notes

Chef's Note

Keloos celery is built for the bite—tender stalks with a clean, sweet snap that stays crisp in slaw and salads instead of going hollow or watery. Use it where you want celery’s bright aromatics to read clearly: quick pickles, chilled salads, or finely chopped for a polished mirepoix.

Best Uses

ice-cold crudités and celery salad with a tight vinaigrette
shred or dice for slaw that keeps its bite
classic quick-pickle or refrigerator brine slices
aromatic base for stocks and soups where you want celery flavor without sharpness

Flavor Profile

clean, mellow sweetness bright, snappy celery crunch herbaceous aromatics with a soft finish

Kitchen Pairings

lemon olive oil parmesan butter chicken white beans

Frequently Asked Questions

What’s the most common problem on Apium graveolens var. dulce (kaleos/celery-type), and how do I treat it?

A common issue is early blight–like foliage spotting and leaf diseases that show up as dark, spreading spots on leaves in humid weather. Remove infected leaves early, water at the soil line (not over the foliage), and improve airflow between plants in your part-sun bed. If spots persist, use an approved garden fungicide labeled for celery/Apiaceae according to the label rate, starting as soon as symptoms appear.

How often should I water keloos during its main growing phase?

During the main growth period (after seedlings establish until the last several weeks), keep the soil evenly moist—aim for consistently damp soil down to about 6–8 in. Water about 1–2 times per week, increasing to more frequent watering during hot spells, but never let the soil fully dry out. Mulch helps prevent swings, which are a common cause of tough stalks and poor flavor in celery-type crops.

How can I tell when keloos is ready to harvest at ~90 days?

Harvest when plants reach full size and stalks are firm and crisp, with leaves that stay upright and a good green color typical of celery-type growth. For a clean timing cue, start checking around 80–90 days: if stalks are thick and feel sturdy when you gently lift them, it’s ready. If you’re blanching (where practiced), harvest after the desired blanching period once stalks are tender and pale enough for your preference.