GardenAnnual Leafy Green · 10 varieties
Amaranth
Amaranthus spp.
Amaranthaceae — the same plant family as spinach, beet, swiss chard, orach and 2 more here. Relatives share pests and diseases, which is why rotation plans group by family.
Amaranth (Amaranthus spp.) is an annual leafy green. It wants full sun and pH 5.5–7 soil, with about 1 in of water weekly. It matures in about 30–120 days from sowing. Watch for aphids and damping off. Below: its full sourced profile from 6 extension sources, plus a planting calendar timed to your frost dates.
Typical dates for zone 6b — set your zone or ZIP for yours. This calendar assumes the crop is direct sown. Timing is a guide from the crop's sourced growth stages; confirm with your local frost dates and extension before you sow.
What we will not put a number on
We do not give a feeding rate for this crop, and that is deliberate rather than a gap. The figures published by extension services are pounds of nitrogen per acre for a production field — they do not convert safely to a raised bed or a pot without knowing your soil test and your fertilizer's analysis, and guessing errs toward burning roots. It is also why every chart you find online disagrees with the next one.
We give watering as a depth per week rather than gallons per plant, because that is how it is actually measured and how the published figures are written. A gallons-per-plant number depends on your spacing, your soil and whether the plant is in a pot — so it would look more precise than it is.
Site & soil
- Sun
- Full sun
- Soil pH
- 5.5–7
- Soil texture
- Well drained
- Frost tolerance
- Tender
No published figure for the temperature that would kill it and a heat limit. We looked — where a number is missing here it is missing from the research, not skipped. The crop’s frost and heat tolerance above still applies.
The plant
- Mature height
- 1.5–7 ft
- Mature spread
- 1–2 ft
- Growth rate
- Moderateest
- Spacing in row
- 6–18 in
- Between rows
- 8–18 in
- Planting depth
- 0.125–0.5 in
- Container size
- 1–3 gal — low end is the minimum, high end is betterest
- Support
- Self-supportingest
- Grown from
- Direct sow
Water & feeding
- Water needs
- Moderate
- Water per week
- 1 in/wkest
- Critical water
- Germinationest
- Feeding
- Moderate
Timing & fruiting
- Days to maturity
- 30–120 days from seed
- Harvest cues
- Rapid leaf growth
- Chilling injury below
- 40 °F
Planted again for autumn
- Sow by
- late Sep typical · zone 6b
30 days to maturity from sowing, counted back from the first frost above. Not published for anywhere in particular: it is your own frost date and this crop's own figure, which is why it works wherever you are. A days-to-maturity figure is a catalog number for a good season rather than a promise, and a cold month moves it.
Edible parts per source: leaf, seed.
Compiled from the extensions cited below. Which ones actually show up depends on your region — your extension's local list is the last word.
| Variety | Type | Days | Color | What it is known for |
|---|---|---|---|---|
| Burgundy Heirloom | Grain | 105 | Red | Botanical Interests describes this asgets by on less water |
| Callaloo Heirloom | Leaf | 30 | Green | Truelove Seeds describes this asgets by on less water · drops seed and comes back on its own |
| Golden Giant Heirloom | Grain | 90–110 | Orange | Baker Creek Heirloom Seeds describes this asgets by on less water |
| Hopi Red Dye Heirloom | Ornamental | 90 | Red | Baker Creek Heirloom Seeds describes this astakes the heat · gets by on less water |
| Love Lies Bleeding Heirloom | Ornamental | 65–75 | Red | Texas A&M AgriLife Extension records this astakes the heat · gets by on less water |
| Mercado Heirloom | Grain | 125 | Green | Smart Gardener describes this asgets by on less water · takes the heat |
| Molten Fire Heirloom | Ornamental | 30–120 | Red | |
| Opopeo Heirloom | Grain | 125 | Purple | |
| Plainsman | Grain | 110 | Purple | |
| Red Leaf Vegetable Heirloom | Leaf | 90–110 | Bicolor | Botanical Interests describes this astakes the heat · gets by on less water |
- NC State Extension
- Texas A&M AgriLife Extension
- UW-Madison Corn Agronomy (Alternative Field Crops Manual)
- University of Florida IFAS Extension
- University of Nevada, Reno Extension
We compile bare facts from these university-extension and horticultural sources, never copied prose. 15 of the 20 values on this page carry a citation. The rest are marked est; hover one and it says why — either nobody publishes a figure we could point at, or a person set it and attached no source. Figures vary with climate and seed source; confirm with your local extension before you buy.
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