Holy basil (tulsi) with purple flower spikes growing in a sunny garden

How to Grow Holy Basil From Seed

Updated July 2026

Holy basil, also known as tulsi, is an aromatic basil grown for its warm, clove-scented leaves. Slightly fuzzy foliage and tall purple-green flower spikes give it a distinctive look, and the blooms draw in bees and butterflies late in the season. Ready in about 70 days, it is traditionally used in cooking and brewed into a fragrant herbal tea. Grow it in full sun for a fragrant, pollinator-friendly addition to the herb garden.

Quick start

Start seeds indoors about 6 weeks before your last frost, sown a quarter inch deep in warm, moist mix at around 70F. Move plants outside only once nights stay above 50F, spacing them 12 to 18 inches apart in full sun. Keep the soil evenly moist and pinch the tips to keep the plant bushy. Begin harvesting leaves in about 70 days, pinching or leaving flower spikes depending on your goal.

Best tip

For the most tender leaves, pinch off the flower spikes; to feed pollinators, let some plants bloom for the bees and butterflies. Climate matters most at the edges of the season: holy basil is very cold-sensitive, so gardeners in the Northeast and Midwest should wait until nights stay above 50F before setting plants out, while growers in the Deep South, Texas, and Southern California get a long, productive run and mainly need steady water through the hottest weeks.

At a glance

Botanical nameOcimum tenuiflorum (syn. O. sanctum)
Plant typeWarm-season annual herb
USDA zones2 to 11 (grown as a summer annual)
SunFull sun (6+ hours)
Days to maturityAbout 70 days
Height18 to 24 inches
SpacingThin to 12 to 18 inches
WaterRegular; keep evenly moist, never soggy

Uses

Holy basil is prized for its warm, clove-like aroma. Brew the fresh or dried leaves into a fragrant herbal tea, and add them to soups, stir-fries, and other savory dishes for a spicy, peppery lift. In the garden, its purple flower spikes are a pollinator favorite, drawing bees and butterflies late in the season. Pick leaves before heavy flowering for the strongest fragrance.

Frequently asked questions

What is holy basil (tulsi) used for?

Holy basil, also called tulsi, is prized for its aromatic, clove-scented leaves. It is traditionally brewed into a fragrant herbal tea and used to flavor cooking, and it is a well-loved plant in the herb and pollinator garden. Its flowers draw in bees and butterflies through late summer.

How is holy basil different from regular basil?

Holy basil has a warm, clove-like, slightly peppery aroma rather than the sweet flavor of Genovese basil, and its leaves are often a bit fuzzy with tall purple-green flower spikes. It is grown more for tea and fragrance than for pesto, and it tends to be a little more heat-tolerant.

How long does holy basil take to grow?

Holy basil is ready to begin harvesting in about 70 days from sowing. Like other basils it germinates in 5 to 10 days in warm, moist soil, and once plants are bushy you can pick leaves regularly for tea and cooking.

Should I let holy basil flower?

It depends on your goal. If you want the most tender leaves for tea and cooking, pinch off the flower spikes to keep the plant producing foliage. If you want to support pollinators, let some plants bloom, since the flowers are very attractive to bees and butterflies late in the season.

Ready to grow your own? Start with a value set that includes basil, plus many more herbs and vegetables for a full, fragrant garden. For the full step-by-step, see our complete basil growing guide linked at the top of this page.

SaleHoly Basil Seeds
Holy Basil SeedsHeirloom, non-GMOHeirloom Holy Basil (Tulsi) — clove-scented leaves for fragrant teas and Thai cooking.
Price$4.99Starting at$3.99
View product

Want more than holy basil? These value sets pair basil with many more herbs and veggies:

Sale75 Herb & Vegetable Seeds Variety Pack
75 Herb & Vegetable Seeds Variety Pack75 varieties in one setThe big all-in-one garden in one box: herbs, greens, and vegetables together.
Price$63.99 Sale Price$59.99
View product
SaleVegetable Seeds Variety Pack
Vegetable Seeds Variety Pack55 vegetable varietiesA full season of vegetables: 55 heirloom, non-GMO varieties to fill the garden.
Price$21.99Starting at$17.99
View product
Maxim Kaufman, Founder and CEO of Organo Republic

By Maxim Kaufman — Founder & CEO, Organo Republic

Maxim founded Organo Republic in 2017 and personally selects, tests, and grows the heirloom, non-GMO varieties the company offers. Under his leadership, Organo Republic was named Agri Business Review’s Top Non-GMO Seed Variety Solution 2026.

Stay Connected

Join Our Garden Community

Daily garden inspiration, how-to videos & behind-the-seeds stories.