Growing Amaranth in Australia: The Complete Guide

Amaranth is an easy grain & staple to grow, needing full sun with low–moderate, drought-tolerant watering.

Amaranth is one of the easy additions to a home garden, and this article walks through everything behind our one-page printable guide in a good deal more depth than a single card allows.

It's worth being clear about why amaranth is worth the bed space before getting into how to grow it. At a glance, it's rated easy, with a sun of full sun; water of low–moderate, drought-tolerant; soil ph of 6.0–7.5 — details that matter more once you're actually planning around them than they do on a first read. The rest of this article works through exactly what each of those means day to day, in more depth than a single printable card has room for, and with the reasoning behind each recommendation rather than just the recommendation itself.

Climate and Timing Considerations

Australia's climate zones change growing timing more than most general advice accounts for. Cool temperate zones (Tasmania, the Victorian highlands, southern NSW) have recurring frost risk well into what other zones call spring, which compresses the safe planting window for frost-tender plantings. Warm temperate zones (Sydney, Adelaide, Melbourne, Perth) sit closest to what general advice assumes by default. Subtropical zones (Brisbane, northern NSW) rarely see frost at all, and the growing calendar shifts earlier and later as a result. Our site-wide zone setting adjusts the advisory note shown on the Planting Calendar for exactly this reason — worth setting once if you haven't already. The same zone setting also feeds the Harvest Calendar, so both ends of the growing cycle reflect wherever you actually garden, rather than a generic Australia-wide average.

• Cool Temperate (TAS, VIC highlands, southern NSW, ACT): shorter frost-free window — lean toward the later end of any spring planting window shown on the guide above.
• Warm Temperate (Sydney, Adelaide, Melbourne, Perth, coastal NSW/WA): closest match to the general timing shown above; frost is occasional but rarely severe.
• Subtropical (Brisbane, northern NSW, coastal QLD): minimal frost risk — often plantable a few weeks earlier and later than the general window shown above.

Grain and leafy green in one plant

Amaranth is unusual in offering two harvests from one planting — pick young leaves as a nutritious green through the season, then let some plants mature fully for a grain harvest.

Planting Amaranth

Method. Direct sow, surface sown, needs light to germinate.

Soil. Tolerant of poor soil; free-draining preferred.

Timing. Sow after frost risk passes.

These few details do most of the actual work, more than any single trick or shortcut would.

Keeping It Growing Well

A few things matter most here:

• Thin as seedlings establish if grown densely for leaf.
• Water while establishing, then rely mostly on rainfall — quite drought-tolerant.
• Harvest leaves regularly from a portion of the crop.
• Let remaining plants mature fully for a grain harvest.

These aren't equally important, but all of them are worth building into your routine — thin as seedlings establish if grown densely for leaf. Let remaining plants mature fully for a grain harvest. Treat this list as a routine to build rather than a one-off checklist, and it becomes second nature within a season or two.

What Can Go Wrong

The key things to get right:

• Very few pests — a hardy, easy crop.
• Bird competition for grain — net maturing seed heads if harvesting for yourself.
• Self-seeding beyond bounds — harvest before full seed drop if containment matters.
• Waterlogging — ensure reasonable drainage.

None of these are complicated on their own, but skipping one is a common source of trouble — very few pests — a hardy, easy crop. Waterlogging — ensure reasonable drainage. Treat this list as a routine to build rather than a one-off checklist, and it becomes second nature within a season or two.

Harvest and Storage

Signs. For grain: seed heads dry and seeds fall easily when rubbed. For leaf: pick young, tender leaves anytime.

Method. For grain: bend heads over a container and rub to release seed.

Curing. Dry seed thoroughly before storing.

Storage. Grain: airtight, cool, dark, many months. Leaves: fridge a few days.

None of these are difficult individually — the value is in getting all of them right at once.

Preserving. See Dehydrating for drying grains fully before storage.

Companions & rotation

Our printable card above lists specific plants that pair well nearby and others best avoided, along with a rotation note: Corn, Beans, None major. Getting this right matters more over multiple seasons than it does in any single one — the benefits and the risks of poor rotation both compound over time rather than showing up immediately.

Related Guides

If amaranth suits your garden, these related guides in the same category are worth a look too:

• Corn
• Quinoa
• Sunflower

That's the full picture behind amaranth. The printable A4 version of this guide — with the quick-reference gauges and diagram in one page — is available on the main guide page below. If you're planning a whole bed rather than a single plant, our Companion Planting Checker is worth using alongside this guide. As with every guide on this site, this is general information based on our own research and experience, not professional advice — your specific soil, climate, and circumstances will always vary from ours to some degree.

Beyond the printable card, our Planting Calendar and Harvest Calendar tools will show a zone-adjusted note for amaranth specifically, and the Companion Planting Checker covers the specific pairings mentioned above in more detail.

Frequently Asked Questions

→ View the printable A4 guide for amaranth