Mentor

Family: Apiaceae Vegetable

Planting Schedule

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Aromatic and deeply savory, Mentor Celery rewards the patient gardener with crisp, cool-green stalks that hold their snap from garden to table.

The flavor is clean and bright—less sharp than many, with a gentle sweetness that lingers—while the texture stays pleasantly firm, ideal for long, satisfying harvests. Grow Mentor for standout presence in fresh salads, elegant braises, and silky soups and sauces where its celery character shines.

Light: Part SunMaturity: 95 DaysHabit: Rosette

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Mentor 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 21st – Aug 29th
Zone 2b	Mar 6th	May 8th	Aug 11th – Aug 25th
Zone 3a	Mar 6th	May 8th	Aug 11th – Sep 1st
Zone 3b	Mar 10th	May 12th	Aug 15th – Sep 21st
Zone 4a	Mar 6th	May 8th	Aug 11th – Sep 24th
Zone 4b	Mar 4th	May 6th	Aug 9th – Sep 27th
Zone 5a	Feb 27th	May 1st	Aug 4th – Sep 30th
Zone 5b	Feb 23rd	Apr 27th	Jul 31st – Oct 5th
Zone 6a	Feb 20th	Apr 24th	Jul 28th – Oct 10th
Zone 6b	Feb 14th	Apr 18th	Jul 22nd – Oct 16th
Zone 7a	Feb 9th	Apr 13th	Jul 17th – Oct 20th
Zone 7b	Jan 30th	Apr 3rd	Jul 7th – Oct 28th
Zone 8a	Jan 21st	Mar 25th	Jun 28th – Nov 5th
Zone 8b	Jan 12th	Mar 16th	Jun 19th – Nov 12th
Zone 9a	Dec 26th	Feb 27th	Jun 2nd – Nov 26th
Zone 9b	Dec 1st	Feb 2nd	May 8th – Dec 9th
Zone 10a	—	Oct 1st	Jan 4th – Feb 28th
Zone 10b	—	Oct 1st	Jan 4th – Feb 28th
Zone 11a	—	Oct 1st	Jan 4th – Feb 28th
Zone 11b	—	Oct 1st	Jan 4th – Feb 28th
Zone 12a	—	Oct 1st	Jan 4th – Feb 28th
Zone 12b	—	Oct 1st	Jan 4th – Feb 28th
Zone 13a	—	Oct 1st	Jan 4th – Feb 28th
Zone 13b	—	Oct 1st	Jan 4th – Feb 28th

Crop Details

Trait	Value
Days to Maturity	95
Sun Requirements	Part Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	45
Min Night Temp (°F)	32
Harden Off (days)	6

Culinary Notes

Chef's Note

Mentor celery is for when you want the whole celery experience—snappy bite plus a clean, non-rude sweetness—without the harsh bite that some stalks bring. It holds structure in braises and still tastes bright enough raw, so it works from sharp salad to aroma-forward soups and sauces.

Best Uses

raw crudités and shaved celery salads (needs zero cooking to shine)
braised celery in butter or stock—long simmer for tender ribs without collapsing
silky purees and velouté-style soups where the aroma can infuse
fast sauté base for greens and dressings when you want celery notes without oniony edges

Flavor Profile

cool-green snap with gentle sweetness aromatic, deeply savory celery character clean, bright aromatics with minimal sharpness firm, fibrous crunch that stays crisp

Kitchen Pairings

butter lemon parmesan white fish cream chicken stock

Frequently Asked Questions

Mentor (Apium graveolens var. dulce) — what pest or disease should I watch for, and how do I treat it?

Watch for celery leaf spot (fungal leaf spots) and aphids; both often show up after humid weather or crowded plants. Remove heavily spotted leaves promptly and improve airflow with wider spacing; if spots are spreading, use a labeled fungicide that includes celery/leaf-spot control. Rinse aphids off with a strong water spray and repeat every few days until controlled, or use an insecticidal soap per label directions.

How often should I water Mentor during the main growing phase (when leaves are filling out)?

Keep the soil consistently moist but not waterlogged from transplanting onward—target evenly damp soil down to the top few inches. In warm periods, this usually means watering about 1–2 times per week, but adjust to weather so the surface never dries out completely. Mulch lightly to stabilize moisture, and avoid letting water splash onto foliage for long stretches.

How can I tell when Mentor is ready to harvest?

Harvest when plants reach full size and about 95 days from sowing (or your listed maturity window), with firm, well-developed leaves and sturdy stems. Start by cutting outer leaves and let the inner growth continue, or harvest the whole plant once it looks dense and mature. If flavor turns bland or leaves become stringy, harvest promptly rather than waiting longer.