Aji dulce / Aji cachucha (Capsicum chinense) growing guide

Quick facts

Category: fruiting
Difficulty: intermediate
Days to harvest: 90 to 110 days
Harvest type: continuous production over weeks or months
Spacing: 50 cm between plants

Environment

Temperature: 21–30°C
pH: 5.8 to 6.8
EC (hydroponic): 1.8 to 2.6 mS/cm
Daily light: 22 to 30 mol/m²/day (strict, will fail outside this range)

Climate and zones

USDA zones: 9 to 13 (winter low around -7°C or warmer)
Frost tolerance: frost sensitive (dies at first frost)
Season: warm (summer crops, frost-sensitive)

Viable growing environments:

outdoor in growing season (annual)
unheated greenhouse / hoop house
heated greenhouse
indoor (heated home)
indoor hydroponics under grow lights

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

Aji dulce works in:

drip / Dutch buckets
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 (aji dulce works in the media listed below).

Medium	pH effect	Water retention	Bacterial surface
Expanded clay pebbles (LECA)	neutral / inert	low	high
Coco coir (Coconut coir)	slightly acidic	high	moderate
Perlite (Expanded volcanic glass)	neutral / inert	very low	low
Rockwool (Mineral wool)	alkaline until pre-soaked	very high	low
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	2	1	1	1.2
vegetative	3	1	2	1.8
flowering	1	2	3	2.2
fruiting	1	2	3	2.4

Companion-growing notes

Heavy uptake of potassium, calcium. Co-grown crops with the same demand will end up deficient even at "correct" EC. Plan around this in shared reservoirs.

Aquaponics suitability

Compatible with typical aquaponics nutrient profiles. Fish waste provides enough nitrogen for healthy growth; supplemental potassium, calcium, and iron may still be needed depending on fish stocking density.

Care notes

Well-suited to indoor hydroponic growing due to compact plant size. EC 2.0-2.8 mS/cm. pH 5.5-6.5. Temperature: 22–32°C (C. chinense species prefer heat; growth stalls below 18°C and frost kills the plants). Full sun or strong supplemental light (DLI 18-25 mol/m2/day). The compact habit works well in DWC, Dutch bucket, or NFT systems. Fruits are small (3–5 cm) and produced prolifically on well-fed plants. Harvest when fully colored (90-110 days from transplant). Calcium and magnesium supplementation prevents blossom end rot and yellowing. The plants are perennial in warm conditions and continue producing for 2+ years if kept above 15°C. Good airflow prevents fungal issues. Aji dulce is an excellent choice for hydroponic growers who want the distinctive habanero-family aroma in cooking without the extreme heat. The compact plants and prolific fruiting make it one of the more practical pepper varieties for small indoor systems. The sweet-but-aromatic chinense flavor profile is unique and cannot be replicated with C. annuum sweet peppers. This makes aji dulce valuable for cooks who want the habanero family aroma in dishes without any significant heat. In Caribbean cooking, aji dulce is used in sofrito (the base for rice, beans, and stews) and in pepper sauce. The plants produce 50-100+ small fruits over a season, providing abundant supply for kitchen use.