Black Aztec

Corn

75d to harvest

Sink your senses into Black Aztec’s velvety, near-black kernels that gleam with a subtle satin sheen, promising a rich, earthy sweetness when ground for flour. The cobs develop in a bold, upright silhouette and fill out evenly, delivering a dense, fine-textured meal prized for its deep color and distinctive character. Grow this flour corn for baking and thickening with a dramatic, heritage-inspired hue that turns everyday recipes into something unforgettable.

Crop Dates

Growing note: In frost-free Zone 10b, grow this cool-season crop during the cooler dry season (October–February).

Milestone	Date
Start Indoors	—
Climate	Frost-Free Climate
Transplant / Sow Outdoors	Oct 1st
Harvest Begins	Dec 15th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	75
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	60
Min Soil Temp (°F)	60
Min Night Temp (°F)	28
Harden Off (days)	Not Required

Frequently Asked Questions

Why are my Black Aztec beans showing brown, water-soaked spots or yellowing leaves—what disease is this and how do I fix it?

Brown, water-soaked spots that spread can be bean blight, especially after humid, wet weather. Remove and discard the worst leaves, then stop overhead watering and water only at the soil line; improve airflow by spacing plants well if they’re crowded. If you still have new growth, apply a labeled copper-based fungicide early (at the first signs) and avoid harvesting wet foliage.

How often should I water Black Aztec beans during the main growing phase to keep pods forming?

During flowering and pod set (roughly after plants establish until harvest), keep the top 1–2 in of soil evenly moist but not soggy—typically about 1 in of water per week depending on rainfall and heat. Water deeply 1–2 times per week rather than daily sprinkles, and reduce watering if the soil stays wet or leaves look limp without sun stress. If the soil is dry 1–2 in down, water; if it’s damp at that depth, hold off to prevent root and fungal problems.

How do I tell when Black Aztec beans are ready to harvest at 75 days?

Harvest when pods are firm and filled and snap easily in half—typically around 75 days from sowing, but check starting at day 70. Look for pods that are about 4–6 inches long with seeds that are visible and well-sized; don’t wait until beans are fully dry and hard. For best texture, pick every 2–3 days once they start producing so new pods keep setting.