Green Thumb

Family: Amaranthaceae Vegetable

Tender, vividly green foliage with a softly succulent bite—Green Thumb amaranth delivers a lush, garden-fresh flavor that feels both bright and deeply earthy.

Leaves hold their color beautifully and offer a gentle, velvety texture that shines in quick skillet-style preparations, hearty soups, and vibrant sautés. Grow it for abundant harvests at about 45 days, and enjoy a steady stream of greens from a vigorous, upright plant that looks as good as it tastes.

Light: Full SunMaturity: 45 DaysHabit: Upright

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 25th
Harvest Begins	Jun 9th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	45
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	70
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Green Thumb amaranth eats like a tender spinach cousin—succulent, not fibrous—so it benefits from fast heat and a late squeeze of lemon to sharpen the green savor. It holds up in brothy dishes without turning to mush, making it a reliable “add at the end” green.

Best Uses

quick skillet sauté with olive oil and garlic-like aromatics (no long cooking needed)
stir into soups/stews at the end for tender leaves that stay green
wilt over hot grains or beans, then finish with acid to wake it up
flash-cook and serve as a vibrant side with a salty, creamy finish

Flavor Profile

gentle, leafy earthiness softly succulent, velvety bite bright green savor with mild tang

Kitchen Pairings

lemon garlic olive oil butter black beans parmesan

Frequently Asked Questions

What pest or disease commonly affects Amaranthus cruentus, and how can I manage it?

A frequent problem is downy mildew and leaf spotting, especially when leaves stay wet and airflow is poor. Water at the base in the morning, space plants to keep the canopy from crowding, and remove heavily spotted leaves early. If spotting or fuzzy growth appears, apply an appropriate copper-based fungicide following the label for edible amaranth.

How often should I water Amaranthus cruentus during the main growing phase?

During active leaf/seedling growth, keep the top 1–2 in (2–5 cm) of soil consistently moist but not waterlogged. For most home gardens this means deep watering about 2–3 times per week, increasing frequency in hot weather and reducing it after rain. The goal is steady moisture—wilting between waterings can slow leaf growth in Amaranthus cruentus.

How do I tell when Amaranthus cruentus is ready to harvest?

For leaf harvest, start when plants are about 6–10 in (15–25 cm) tall and pick outer leaves regularly; you can harvest from roughly 35–45 days depending on conditions. If you’re harvesting grain/seed, harvest when the flower heads turn from green to tan and the seeds look dark and dry in the panicles, around the 45-day mark. Cut whole heads or pick leaves, and avoid waiting until seeds are fully shattering if you want cleaner harvests.