Amaranth Seeds - Red Garnet


Amaranthus cruentus

Jewel-toned plants are best harvested young for tasty salad greens or to be sauteed like spinach. If grown to maturity, plants reach 6 to 8 feet tall and are highly ornamental. Seed heads are also deep red, with edible seeds similar to quinoa.

Red Garnet amaranth can be direct-seeded or transplanted in spring after the danger of frost has passed. It requires full sun, and takes about 30 days from seeding to maturity for baby greens, or 100 days for seed production. 1 gram packet contains approximately 1,025 seeds.

SMALL FARM GROWN by Against the Grain Farm, Zionville, NC
  • Planting Information
  • Growing Information
  • Seed Saving
Avg. seeds/ packetPacket weightPlanting Season Sowing Method
1,0251 gafter last frostdirect seed
Seed DepthDirect Seed SpacingSoil Temp. RangeDays to Sprout
1/4"3-4"50-75 ℉7-14 
Mature SpacingSun RequirementFrost ToleranceDays to Harvest
18"full sunfrost-sensitive100

Sow amaranth seeds indoors. Individual 3 inches pots are best. If planting in a shared bed, space seedlings 10 to 14 inches apart from one another. Lightly cover each seed with about 1⁄4 inch of soil, and place the bed out of direct sunlight, in an area where is will not be exposed to cold. Keep the seeds around 70 °F. Your seeds will germinate in 10 to 14 days.

Use well-draining soil with a pH between 6 and 7. The soil in which you grow your amaranth should not contain too much clay. Additionally, test your soil’s pH. Amaranth is less sensitive to soil variability than many other plants, but will grow best in soil with a pH between 6 and 7. Extremely rich soil will actually reduce a plant’s number of flowers.

Plant amaranth 6-8 weeks before moving them outdoors. It’s important to time your seeding carefully in colder climates. Ideally, plant them 6 to 8 weeks before you can move them outside. They will still be small enough to easily transplant at this age, but will be harder to replant if much older.

Move plants outdoors once the threat of frost has passed. Plant your amaranth in a mostly sunny location. In seasonal climates, late May or early June is the best time to transplant seedlings. Replant seedlings about 20 inches apart, in soil that will drain well, and in a location that receives at least 6 hours of sunlight per day. If you did not plant seeds indoors early in the season, you can sow seeds directly outdoors once you’re sure there will not be another frost.

Amaranth greens are one of the hardiest salad greens for growth in hot weather. On the other hand, if you’re growing amaranth for the seeds, the lighter-colored seeds, the better.

Amaranth, Amaranthus spp.

Pollination, wind; Life Cycle, annual; Isolation Distance, 1 mile

Amaranth is an increasingly important food crop. The drooping seed heads of this fast growing plant mature from bottom to top, and there are many varieties that will cross readily. For seed production select strong, true-to-type plants. Foliage will lighten or yellow when seeds begin to mature. Harvest the seed-heads by shaking them into a paper bag. Alternatively harvest the entire plant when most seeds are mature. Seeds are easily threshed by hand (wear gloves!). Clean by winnowing. Place clean, dry seeds in air-tight container and store in a cool, dry location.