How to Grow Sesame UK | Full-Season Growing Guide

Sesame (Sesamum indicum)

Golden and black sesame seed side by side on a white ground. Photo: Pancrat, CC BY-SA 4.0, via Wikimedia Commons.

2 sources cited

The short answer

Ready in: 75–150 days
Site: soil pH 5.5–8

In the UK, sesame are ready to harvest 75–150 days after planting.

Sesame (Sesamum indicum) — Frost-tender annual.

Quick Facts

A white tubular sesame flower on the stem — “Sesamum indicum L. (48846595943)” by Dinesh Valke from Thane, India is licensed under CC BY-SA 2.0. Source: Wikimedia Commons — “Sesamum indicum L. (48846595943)” by Dinesh Valke from Thane, India is licensed under CC BY-SA 2.0. Source: Wikimedia Commons.

Factor	Value
Soil pH	5.5 - 8
Germination temp	30C
Time to harvest	75-150 days
Soil texture	Most cultivars are salt-sensitive and do poorly on gravelly or sandy soils
Drainage	Well-drained
Lifecycle	Frost-tender annual; growth is delayed below 20C and inhibited entirely below 10C.

Soil & Growing Conditions

Rows of sesame stooks drying in a harvested field — “Sesame plants being dried after seed removal - 02” by Anna Frodesiak is licensed under CC0. Source: Wikimedia Commons — “Sesame plants being dried after seed removal - 02” by Anna Frodesiak is licensed under CC0. Source: Wikimedia Commons.

Water: Low; 500-650 mm evenly distributed through the growing season

Soil pH range

5.5 8

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

Harvest & Storage

Cut sesame stood in stooks to dry — “Sesame plants being dried after seed removal - 01” by Anna Frodesiak is licensed under CC0. Source: Wikimedia Commons — “Sesame plants being dried after seed removal - 01” by Anna Frodesiak is licensed under CC0. Source: Wikimedia Commons.

When to pick: Capsules split as they dry and shed the seed, so the crop is cut before they are fully ripe and finished under cover. PROTA gives 75-150 days, typically 100-110.

Sesame through the season

Golden and black sesame seed side by side on a white ground — “Graines de sésame blond et noir” by Pancrat is licensed under CC BY-SA 4.0. Source: Wikimedia Commons — “Graines de sésame blond et noir” by Pancrat is licensed under CC BY-SA 4.0. Source: Wikimedia Commons.

The seed

Golden and black. Both come from the same species; the colour is cultivar, not species.

A sesame plant in full flower — “Sesamum indicum L. (48847147397)” by Dinesh Valke from Thane, India is licensed under CC BY-SA 2.0. Source: Wikimedia Commons — “Sesamum indicum L. (48847147397)” by Dinesh Valke from Thane, India is licensed under CC BY-SA 2.0. Source: Wikimedia Commons.

In flower

PROTA gives flowering 42-45 days after sowing under ten-hour days. Sesame is a short-day plant.

The flower

Tubular and carried in the leaf axils, opening white or pink up the stem.

A pink sesame flower with its speckled throat — “Sesame flower closeup” by Strange Burg is licensed under CC BY 4.0. Source: Wikimedia Commons — “Sesame flower closeup” by Strange Burg is licensed under CC BY 4.0. Source: Wikimedia Commons.

Flower detail

The speckled throat guides insects in. Cultivars vary from white through to deep pink.

A honeybee visiting a white sesame flower — “Sesamum indicum 3” by Apurv013 is licensed under CC0. Source: Wikimedia Commons — “Sesamum indicum 3” by Apurv013 is licensed under CC0. Source: Wikimedia Commons.

Pollination

Sesame is largely self-pollinating but readily worked by bees, and is a useful late nectar source in hot climates.

A single sesame plant carrying flowers up the stem — “Planta de ajonjolí en Guayameo, Gro.” by JaredDG is licensed under CC BY-SA 4.0. Source: Wikimedia Commons — “Planta de ajonjolí en Guayameo, Gro.” by JaredDG is licensed under CC BY-SA 4.0. Source: Wikimedia Commons.

The whole plant

An erect annual carrying capsules up the stem. Maturity comes 75-150 days after sowing, typically 100-110.

Why it is cut early

The capsules split as they dry and shed the seed, so the crop is cut slightly before full ripeness and stood in stooks to finish.

Drying in the field

Stooks are later inverted over sheets so the seed falls out as the capsules open.

Bundles of cut sesame carried from the field — “Seame plants being carried - 01” by Anna Frodesiak is licensed under CC0. Source: Wikimedia Commons — “Seame plants being carried - 01” by Anna Frodesiak is licensed under CC0. Source: Wikimedia Commons.

Carrying the crop

Handled gently: every knock at this stage costs seed.

A hand lifting black sesame seed from a bowl — “Sesamum indicum 4” by পাপৰি বৰা is licensed under CC BY-SA 4.0. Source: Wikimedia Commons — “Sesamum indicum 4” by পাপৰি বৰা is licensed under CC BY-SA 4.0. Source: Wikimedia Commons.

Threshed

ALLERGEN: sesame is a major regulated allergen in the UK, EU and USA. Reactions can be severe -- label anything you share.

References

2 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

How long do sesame take to grow?

Typically 75–150 days, depending on cultivar and growing conditions.

What soil pH do sesame 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.

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.

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How to Grow Sesame UK | Full-Season Growing Guide

Sesame (Sesamum indicum)

Quick Facts

Soil & Growing Conditions

Harvest & Storage

Sesame through the season

References

Frequently Asked Questions

Where To Go From Here

Plan the next step

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How to Grow Sesame UK | Full-Season Growing Guide

Sesame (Sesamum indicum)

Quick Facts

Soil & Growing Conditions

Harvest & Storage

Sesame through the season

References

Frequently Asked Questions

Where To Go From Here

Plan your veg garden before you dig a single inch

Plan the next step