How to Grow Quinoa UK

By the SoilCommander Editorial Team, under the guidance of Nitin Sharma, Co-Founder · · How we check our facts

On this page
  1. Quinoa (Chenopodium quinoa)
  2. When to Plant Quinoa in the UK
  3. Quick Facts
  4. At a Glance
  5. Soil & Growing Conditions
  6. Growth Stages
  7. Harvest & Storage
  8. Diseases
  9. Pests
  10. Quinoa, the Grain of the Incas
  11. Plan your Quinoa planting
  12. Growing Quinoa in another region
  13. References
  14. Frequently Asked Questions

In the UK, quinoa goes in the ground early April to early May.

Timing is the decision that matters most in the UK: sowing early April, and that same window applies across all 4 regions covered here.

The short answer

Plant
Early April to early May
Site
soil pH 5.5–8
Biggest risk
Quinoa downy mildew

Core growing advice on this page is checked against named horticultural sources — see References.

Quinoa (Chenopodium quinoa)

Tall rows of quinoa plants growing in a field — “Productive quinoa real plant” by Michael Hermann is licensed under CC BY-SA 4.0.

7 sources cited · Verified

When to Plant Quinoa in the UK

When to plant quinoa in the UK: in Southern England, sow early April to early May. Find your area in the table below.

Quinoa seedlings germinating in soil — “Proceso de germinación de la quinua” by Grupo Colombio is licensed under CC BY-SA 3.0.
“Proceso de germinación de la quinua” by Grupo Colombio is licensed under CC BY-SA 3.0.
Region Sow
Southern England early April to early May
Midlands early April to early May
Northern England early April to early May
Scotland early April to early May
Southern England - detail & sources

Homes and Gardens: delay planting out until after the last spring frost, with no UK-region-specific dates given; this window is applied across all four sub-regions rather than inventing a north/south gradient the sources do not support.

Midlands - detail & sources

Homes and Gardens: delay planting out until after the last spring frost, with no UK-region-specific dates given; this window is applied across all four sub-regions rather than inventing a north/south gradient the sources do not support.

Northern England - detail & sources

Homes and Gardens: delay planting out until after the last spring frost, with no UK-region-specific dates given; this window is applied across all four sub-regions rather than inventing a north/south gradient the sources do not support.

Scotland - detail & sources

Homes and Gardens: delay planting out until after the last spring frost, with no UK-region-specific dates given; this window is applied across all four sub-regions rather than inventing a north/south gradient the sources do not support.

A page from the UK Vegetable Garden Planner PDF: the crop rotation planner, with a planning grid and four-bed rotation tips

Plan your quinoa — and the rest of the plot

This page covers quinoa. For every crop's sowing months on one chart, use the free UK vegetable planting calendar, and browse the UK vegetable growing guides for what else to grow alongside it. When you want the whole season on paper, the UK Vegetable Garden Planner is a printable PDF:

  • Twelve month-by-month sowing and harvest spreads
  • Raised bed, allotment and container layout pages for your own plot
  • A four-year crop rotation planner
  • Seed inventory, sowing log and harvest tracker
See inside the UK Vegetable Garden Planner →

Instant PDF download · reprint every season

Quick Facts

Tall rows of quinoa plants growing in a field — “Productive quinoa real plant” by Michael Hermann is licensed under CC BY-SA 4.0.
“Productive quinoa real plant” by Michael Hermann is licensed under CC BY-SA 4.0.
Factor Value
Soil pH 5.5 - 8
Optimal growing temp 14-18°C
Minimum survivable temp -8°C
Drainage Chalk, Loam, Sand; moist but well-drained or well-drained; low-nitrogen soils preferred (high-N promotes leafiness over seed production)
Lifecycle annual
Edible parts seeds

At a Glance

Mature golden-red quinoa seed heads ready for harvest — “Quinoa growing on Isla del Sol, Lake Titicaca” by Bob Ramsak is licensed under CC BY-SA 4.0.
“Quinoa growing on Isla del Sol, Lake Titicaca” by Bob Ramsak is licensed under CC BY-SA 4.0.
Chenopodium quinoa Quinoa Quinoa downy mildew Lygus bug Aphids DISEASES PESTS

Soil & Growing Conditions

A deep red flowering quinoa plant — “QUINUA REAL variedad sin identificar (3) UYUNI-POTOSÍ” by PeñayLillo is licensed under CC BY-SA 4.0.
“QUINUA REAL variedad sin identificar (3) UYUNI-POTOSÍ” by PeñayLillo is licensed under CC BY-SA 4.0.

Soil pH range

5.5 8

Span reflects genuine variation between the cited authorities, not a single agreed figure.

Growth Stages

Purple quinoa flower heads growing in a field — “Red quinoa plants” by Michael Hermann is licensed under CC BY-SA 4.0.
“Red quinoa plants” by Michael Hermann is licensed under CC BY-SA 4.0.
Stage BBCH Notes
Sowing 0 Propagate by seed; seedlings do poorly in cold conditions, so delay planting out from seed trays until after the last spring frost (RHS, Homes and Gardens).
Leaf growth 3 Grows quickly upright to 1.5-2.5m tall, in full sun -- cannot grow in shade (RHS, Homes and Gardens).
Flowering 6 In flower July to August; tolerates light frosts but flower heads are damaged by frost and very cold weather (Homes and Gardens).
Seed ripening and harvest 8 Seeds ripen August to September, harvestable after flowering (Homes and Gardens, RHS).

Harvest & Storage

Mature golden-red quinoa seed heads ready for harvest — “Quinoa growing on Isla del Sol, Lake Titicaca” by Bob Ramsak is licensed under CC BY-SA 4.0.
“Quinoa growing on Isla del Sol, Lake Titicaca” by Bob Ramsak is licensed under CC BY-SA 4.0.

When to pick: Quinoa dries down in the field; harvest when leaves have fallen and seed heads feel dry and firm, usually early fall; average time from planting to harvest is approximately 120 days; pollen may become sterile or seed death may occur above 95°F (35°C) during flowering

Diseases

Tall rows of quinoa plants growing in a field — “Productive quinoa real plant” by Michael Hermann is licensed under CC BY-SA 4.0.
“Productive quinoa real plant” by Michael Hermann is licensed under CC BY-SA 4.0.
Quinoa downy mildew

Peronospora variabilis

Pests

A deep red flowering quinoa plant — “QUINUA REAL variedad sin identificar (3) UYUNI-POTOSÍ” by PeñayLillo is licensed under CC BY-SA 4.0.
“QUINUA REAL variedad sin identificar (3) UYUNI-POTOSÍ” by PeñayLillo is licensed under CC BY-SA 4.0.
Lygus bug

Lygus spp.

Aphididae (various spp.)

Plan your Quinoa planting

When to sow and plant Quinoa depends on your own frost dates. Check the UK vegetable planting calendar. To work out where it fits in your beds, sketch your plot in the free Garden Layout Planner.

Growing Quinoa in another region

Sowing dates, frost timing and local advice differ by country. Use the guide for where you garden.

References

  3. A secondary gardening reference rather than a university or horticultural authority, used only for flowering/ripening timing and cold-sensitivity detail RHS's basic profile does not cover, not contradicted by it. Native to the Andes Mountains. Best grown in cool, dry, upland conditions; may not produce seed if temperatures are too hot; cannot grow in shade. Seedlings do poorly in cold conditions -- delay planting out from seed trays until after the last spring frost. In flower July to August, seeds ripen August to September. Tolerates light frosts, but flower heads are damaged by frost and very cold weather.

  5. RHS explicitly does not recommend pesticide use against aphids; recommends tolerance, manual squashing, and encouraging/purchasing natural predators (ladybirds, hoverflies, lacewings, parasitoid wasps, earwigs) as biological control, especially under glass.

7 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.

Frequently Asked Questions

When should I sow quinoa in the UK?

In Southern England, from early April. In Scotland, wait until early April. Treat these as a guide rather than a fixed date — the governing rule is to sow only once frost risk has passed and temperatures are reliably warm enough.

When do I sow quinoa?

Sow early April to early May.

What soil pH does quinoa need?

A pH of about 5.5–8. That span reflects genuine variation between the authorities we cite rather than a single agreed figure — the References section lists each source's exact range.

What problems affect quinoa?

Our data links 1 disease and 2 pests to this crop. See the sections above for each one and how to manage it.

Plan next season before the problems start

Most of the advice on this page comes down to timing and spacing — sowing at the right moment, rotating beds, and giving plants enough airflow. The UK Garden Planner lays your plot out month by month so those decisions are already made before the season starts.

Get the UK Garden Planner →

Instant PDF download · Written for UK growing conditions

SoilCommander Editorial Team — under the guidance of Nitin Sharma, Co-Founder

Every growing guide is checked against RHS, USDA Cooperative Extension, and other named horticultural authorities before publishing. How we check our facts.

How this guide is put together

The growing data on this page — sowing windows, pests, diseases, soil and site requirements — comes from named horticultural sources, listed in References below, checked against RHS and Met Office guidance. An automated pipeline assembles that verified data into the page you're reading: it selects which facts to lead with and builds the surrounding prose and layout. It does not invent a date, a source or a number — where a verified value for a field isn't available, the page leaves it out rather than guessing. A person reviews and publishes each page; nothing goes live unverified.

Vegetable Growing Guides UK

Crops With the Same Problems

Related Problem Guides

Last verified 2026-08-29

Plan Quinoa by month

The months this guide gives for sowing or planting, each with the full list of jobs for that month in the UK:

More from the same group (grains & pseudo-grains):

Relevant next steps

Where To Go From Here

Take this crop from reading into a written plan for your own beds.

UK garden plannerTurn this crop guide into sowing dates, bed layouts and a harvest record. All growing guidesBrowse every crop we cover for your region, A to Z. Planting CalendarSee how this crop fits alongside everything else you are growing.

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