Sesamum indicum
herbSesame is one of the oldest cultivated oilseed crops, a heat-loving annual grown for the small, flat, nutty, oil-rich seeds packed inside upright capsules along the stem. Slender plants two to four feet tall carry tubular foxglove-like flowers, white to pale pink, followed by the capsules. It is famously one of the most drought-tolerant crops in the world, but it pays for that with a demand for heat: it needs a long, hot season of roughly 110 to 150 frost-free days and warm soil, so it suits southern gardens or the hottest stretch of summer farther north.
Sun
full sun
Water
Every 7 days
Harvest
~100 days
Difficulty
medium
Lifecycle
annual
One season, then done
Spacing
6-12 in. apart
Planting Depth
Seed 1/4 in. deep
Soil pH
6.0-7.0
Soil Type
Light, sandy, well-draining
Hardiness Zones
Zones 7 – 11
Grown as an annual — this range is its winter hardiness, but you can grow it for a single season in any zone.
When to Fertilize
Light feed early in the season
Fertilizer
Balanced; low needs
Sesame must have heat and will simply sit in cold ground, so wait to sow until at least a month after the last frost, when soil has warmed to around 68 to 70F or more, and give it full sun. It prefers fertile, well-drained, medium-textured soil with a neutral to slightly alkaline pH and resents heavy clay and wet feet. Sow seed about a quarter inch deep, thin the seedlings, and keep weeds down while plants are small. Once established it needs little water; easing off moisture late helps the plant dry down and the capsules split cleanly. Flowering begins roughly 38 to 45 days after planting and continues for weeks, since the plant blooms up the stem rather than setting one crop, so the lowest capsules mature first.
Direct sow
Apr 29
Projected first harvest
Aug 7
Good neighbors that attract beneficial insects or deter pests
Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide
Encourage ladybugs and lacewings and hose off colonies on tender tips
Use yellow sticky traps and avoid excess nitrogen that draws them
The challenge with sesame is shattering: ripe capsules split open on their own and spill the seed, so timing matters. Watch the lowest capsules and cut the whole stalks when they turn brown and just begin to split but before they shatter. Hang the stalks upside down inside a paper bag or over a cloth in a dry, airy place, and over a week or two the drying capsules drop their seed to collect and winnow. A few weeks of dry weather at season end makes the job far easier, and since wet seed spoils quickly, keep the harvested seed dry until cured.
Sesame seeds are nutritional powerhouses, roughly half oil by weight and rich in heart-healthy unsaturated fats, plant protein, calcium, iron, magnesium, and zinc, along with the lignans sesamin and sesamolin that act as antioxidants. They are the base of tahini and sesame oil, and toasting brings out their nutty flavor. Because the hull holds much of the calcium and fiber, unhulled seeds are the most nutritious form, while the oil concentrates the fats.
For educational and informational purposes only — HomeSown is not medical, health, or other professional advice. Always positively identify any plant before handling or eating it; some plants, and some parts of otherwise-edible plants, are toxic. Consult a qualified professional before consuming or otherwise using any plant, especially if you are pregnant, nursing, taking medication, or have a health condition.