Chickpea / Garbanzo bean (Cicer arietinum) growing guide

Quick facts

Category: fruiting
Difficulty: intermediate
Days to harvest: 90 to 120 days
Harvest type: single harvest then replant
Spacing: 15 cm between plants

Environment

Temperature: 10–30°C
pH: 6 to 8
EC (hydroponic): 1.2 to 2 mS/cm
Daily light: 18 to 26 mol/m²/day

Climate and zones

USDA zones: 3 to 10 (winter low around -40°C or warmer)
Frost tolerance: tolerates light frost
Season: warm (summer crops, frost-sensitive)

Viable growing environments:

outdoor year-round (in zone)
outdoor in growing season (annual)

USDA zone bounds reflect outdoor year-round survival. Anywhere outside the bounded zone range, this crop still grows as an annual in the warm months (outdoor_seasonal), under cover (greenhouse), or indoors under lights.

Growing systems

Chickpea works in:

media bed (ebb and flow)
soil bed

Growing media

The substrate the roots sit in. Choice depends on the system (clay pebbles don't fit NFT channels; rockwool isn't used in media beds) and the crop (chickpea works in the media listed below).

Medium	pH effect	Water retention	Bacterial surface
Soil-based mix (Potting soil)	varies by source	high	high

Bacterial surface area matters for aquaponics: clay pebbles, lava rock, and pumice double as biofilter substrate. Low-surface media (rockwool, perlite, pea gravel) work in hydroponics but need a separate biofilter in aquaponics.

Nutrient demand by stage

NPK ratios are relative weights at each growth stage; the nutrient mix calculator scales them to absolute grams or ml. EC targets shift through the plant's life: seedlings need a much lighter solution than fruiting adults.

Stage	N	P	K	EC target (mS/cm)
seedling	1	1	1	0.7
vegetative	1	1	2	1.3
flowering	1	1	2	1.5
fruiting	1	1	2	1.5

Aquaponics suitability

Not recommended for pure aquaponics. Fish waste alone doesn't provide enough of the nutrients this crop demands (typically potassium, calcium, or boron). It can be grown in a hybrid system where the reservoir is supplemented with hydroponic-style nutrients, but expect to dose actively.

Care notes

Not a common hydroponic crop, but feasible in media bed or container systems. EC 1.5-2.5 mS/cm. pH 6.0-7.0. Temperature: 18–28°C (warm-season crop; frost kills the plant). Moderate to high light (DLI 16-22 mol/m2/day). The nitrogen-fixing capability is reduced or absent in hydroponic systems because the symbiotic Rhizobium bacteria may not be present in sterile media; supply nitrogen through the nutrient solution. From seed to harvest (dry chickpeas): 90-110 days. The plants are determinate: they grow, flower, set pods, and die. Harvest when pods are brown and dry on the plant, then shell the dried seeds. For fresh green chickpeas (a delicacy in some Middle Eastern cuisines, eaten like edamame), harvest pods while still green and plump. Each plant produces a relatively small yield (30–50 g of dried seed), so a large planting is needed for meaningful production. Ascochyta blight is a concern in humid conditions; good airflow helps. For aquaponics growers, chickpeas in media beds are a viable legume option for personal use, though the yield per plant is modest compared to bush beans.

Notable varieties

A starting shortlist of cultivars worth knowing about. Not exhaustive: the seed catalogs list hundreds of named varieties. These are the ones home growers commonly choose between.

Cultivar	Type	Days	Notes
Kabuli (cream)	open-pollinated	100	Large cream-colored chickpea, the hummus and falafel variety. Multiple commercial cultivars (UC-15, Sierra, Sanford) share the type. Slightly later than desi, prefers warmer growing conditions. Zones 5-10.
Desi (small dark)	open-pollinated	90	Small angular brown or black seeds, the type that becomes chana dal (split) in Indian cooking. Higher fiber, slightly nuttier flavor. More drought-tolerant and earlier than kabuli. The dominant chickpea in India.
Black Kabuli (Ceci Neri)	heirloom	110	Italian heirloom from Puglia, large black-coated chickpeas. Sweet rich flavor, holds shape well in soups. Pre-modern variety, available through heritage seed catalogs.