This is for informational purposes only. For medical advice or diagnosis, consult a professional.
🐝🦋 Popular pollinator attractor
🛡️Bring indoors during Winter

▷ IDENTIFICATION🔍
Common Name: Holy Basil
Botanical Name: Ocimum tenuiflorum or Ocimum sanctum
Family: Mint family (Lamiaceae)
Fragrant perennial tropical herbaceous shrub for Zones 1 to 22
USDA says it grows best in zones 10b to 11
PRECAUTION: Contains low thujone content. May interact with anticoagulant and diabetes medications. Not appropriate for all, consider consulting a doctor first. See section “ADDITIONAL INFORMATION > Animal Toxicity and Medicine Interactions”.
❗Children, pregnant, or breastfeeding: This plant may be harmful if used internally for young children, pregnant, or breastfeeding people. Research or speak with a healthcare professional. 🚼
▷ OTHER NAMES & LOOKALIKES 🏷️
Other Names 🏷️
◦ Sacred Basil
◦ Tulsi
Lookalikes 🔎
◦ Thia Basil (Ocimum basilicum): Leaves are shiny and green with purple tinged stems. Often used in Asian cooking, especially pho soup.
◦ African Basil (Ocimum gratissimum): Has light green, slightly hairy leaves with a strong clove scent and spicy flavor.
◦ Chinese Chaste (Vitex negundo): a large aromatic shrub with quadrangular, densely whitish, tomentose branchlets.
▷ APPEARANCE 🪞
Plant Description🌿🗒️
Aromatic shrub with a beautiful scent, excellent for attracting pollinators. Edible green or purple leaves are 2″ length, ovate in shape, with slightly toothed margin edges. Leaves are arranged opposite on square stems which are covered in tiny hairs. Flowers are small, tubular, two-lipped, lilac or pink-purple in hue, appearing in small clusters as whorls on spike-like inflorescence.
Dimensions, Root Depth, and Spacing 📏↔️
Height: 1′ to 3′
Width: 8″ to 24″
Root Depth: 12″ deep; Ideal minimum container size 7 gallon or 8 gallons. Larger containers allow plants to grow taller and wider!
Spacing: 24″ apart
Flower Season and Fruit or Seed 🌻🍎🫘
Flower: Fragrant, pink-purple clusters of flowers appearing along tall inflorescence
Seed: Tiny black seeds, 3.2 millimeters length and 1.8 millimeters width
▷ REPRODUCTION🌱
Sexuality: Hermaphrodite
Pollination: Pollinated by bees, butterflies, and other beneficial insects
Growth Rate: Fast
Propagation:
◦ Layering: Select a thick stem that is long enough to lay in nearby container of soil. Remove leaves from the middle section of the stem, this part of the stem will be planted carefully and directly into the soil while still attached to the plant. Water as is necessary to keep soil consistently moist, especially during the Summer. Roots should form on the buried stem in a month, and may thereafter be cut and replanted into individual pots.
◦ Roots: Not relevant
◦ Cuttings: Plant cuttings that are ⅜” to ½” diameter (the wider the stem, the higher percentage of success) and 4″ to 6″ tall. Add cuttings to water and change the water every day for 1 month until roots form, later planting in soil in a container, or propagate by planting in soil during the Spring. Protect the new plant by placing it in partial sun or under a grow light until it has matured, avoiding direct sun.
Seed Germination: When soaked for 15 minutes, seeds develop a gel coating. Soil pH 5.6 to 7.5 at preferably 65°F to 70°F, may germinate at preferably 75°F to 85°F, kept moist, however not wet or dry. Plant seed ⅛” deep, emerges 3 to 12 days after being sown. Germination rate of 90% (depending on producer).
Indoor Planting: Grow plant for 1 year prior to transplanting outside 12 to 14 weeks after last frost date.
Outdoor Planting: Plant seed 12 weeks after to last frost date.
▷ REQUIREMENTS❤️
Sunlight, Water, Fertilizer, and Pruning ☀️💧✂️
Sunlight: 6 hours to 8 hours of full sun
Note: Avoid aerial watering, which encourages fungal growth and disease.
Holy basil is intolerant of overwatering, which may cause root rot or mold.
Outdoor Watering: Water regularly during Summer (every 2 to 4 days) and less frequently in the Winter (1 to 3 times per month, more often if a warm climate). K-cup seed starters need water every day during Summer and every 2 days during Winter. Small pots require watering more often, especially if exposed to full sun, while large pots and shaded pots need less water.
Indoor Watering: Deep and infrequent, allowing for soil to dry on the top layer prior to more water.
Drought Resistance: Drought tolerant once established.
Fertilizer: At the start of the growing season, apply fertilizer every 4 weeks to 8 weeks. Scatter evenly at the base of plants, avoiding clumps of fertilizer and preventing contact with stalks and stems. Large clumps of fertilizer won’t evenly supplement nutrients into the entire soil surface after it mixes with water from rain or irrigation. Fertilizer clumps around the base of plants make cause the main stalk to rot or have contact burns, which could damage or kill the plant. Do not throw fertilizer over plant tops, as the clumps of fertilizer caught in between leaf nodes and on foliage may either burn or rot the foliage.
Pruning: Avoid pruning during Winter as it may kill the plant. This same rule applies for the Fall in northern climates. Remove withered flowers, dead leaves, and leggy stems to enhance plant’s appearance. This also promotes new stems to appear with more leaves and flowers.
Soil, Planting, and Environment 🌄🏞️🏜️
Soil: Prefers moist, well-drained loam. Intolerable of wet soil. Tolerates poor laterite to rich loam, and in mildly acidic, neutral, and mildly alkaline soils.
pH: Prefers 6.0 to 7.5; Tolerates 5.0 to 9.0
Planting: When planting a potted plant, dig a hole that’s as deep as the pot and as wide as the root base. For plants with wide roots, dig a hole that is twice the width of the pot and gently space out the root system and then cover with soil to promote healthy growth. Burying tangled roots could cause health issues or stunted growth. The soil should be gently pressed in or watered in to fill the air pockets, preventing soil from collapsing in when watering or raining. Unplanted roots add to the stress of plants and could cause health problems or diseases. Cover every root with soil and smooth the soil’s surface.
Habitat: Native to semitropical and tropical regions of India. Found in lowland tropics.
Temperature Preference and Temperature Tolerance🌡️
Temperature: Prefers 70°F to 80°F; Mulch roots to retain water and prevent evaporation.
Heat Tolerance: 95°F; Above 95°F may damage the plant, stop growth, or cause it to bolt. Drought tolerant once established.
Cold Tolerance: 59°F; Below 50°F stresses the plant and may health problems. Once cold weather arrives, optionally harvest the entire plant if it won’t be brought indoors before frost kills the plant.
Salt, Wind, and Pollution Tolerance 🧂💨 ☣️
Salt Tolerance: Low tolerance
Wind Tolerance: Moderate tolerance
Pollution Tolerance: Low tolerance
▷ ADDITIONAL INFORMATION📚
Description 📝
Native to tropical and subtropical regions of Australia, Malesia, Asia, and the western Pacific. It is widely cultivated throughout the Southeast Asian tropics.
Attract and Repel Wildlife🐝🦋🐦🐌🪰🐇🦌
Deer and Rodent Resistant🦌🐇🐁
Attracts: Bees, butterflies, hummingbirds, and other beneficial insects
Repels: Mosquitoes and flies
Diseases and Pests🐜🦠
Note: Proper care keeps plants resilient and healthy, preventing diseases and pests. This list details the potential threats, specific diseases and pests vary depending on environmental climate.
Diseases:
◦ Crown Rot
◦ Basal Rot
◦ Downy mildew: A destructive disease that may become widespread if left uncontrolled.
◦ Gray mold: Causes wilted foliage on cankered stems.
◦ Fusarium wilt: A common disease caused by a seedborne fungus that causes partial or general wilting.
◦ Leaf Spot: A diseased or discolored area on a leaf caused by a plant disease or injury. Leaf spots may be caused by fungi, bacteria, or viruses, or by injuries from insects, nematodes, environmental factors, herbicides, or toxicity
◦ Powdery Mildew: Disease caused by a fungus due to overwatering or overcrowding, making the plant vulnerable to other pests.
◦ Root Rot: Affects the roots of plants growing in wet or damp soil, may be lethal to both indoor and outdoor plants.
Pests:
◦ Aphids: Small, soft-bodied sucking insects which pierce plant tissues and draw out the juices.
◦ Snails and Slugs: They eat a wide variety of plants, including young seedlings, mature plants, and turfgrasses, and may cause damage to gardens and flower beds.
◦ Spider mites: They feed by bruising plant cells with their small, whiplike mouthparts and ingesting the sap. Spider mites produce a fine silk webbing, often found at leaf nodes or the undersides of leaves, which may kill plants or cause serious stress to them.
◦ Whiteflies: Flying insects that suck the sap from plants.
Animal Toxicity and Medicine Interactions ☠️❤️🩹
Holy Basil contains moderate levels of thujone, and should be used sparingly. Thujone is a chemical compound found in specific herbs and is toxic in high amounts. Pregnant, breastfeeding mothers, and young children should avoid consuming thujone. Consuming excessive thujone may cause nausea, vomiting, abdominal cramps, dizziness, seizures, damage to the liver and nervous system, coma, or death. Thujone toxicity is higher with concentrated forms like teas, extracts, and oils. Thujone consumed from common culinary use of these herbs now and then is considered safe for consumption.
High Thujone Content: Wormwood (do not eat) and Mugwort
Moderate Thujone Content: Holy Basil, Sage, and Yarrow
Low Thujone Content: Thai Basil, Sweet Basil, Thyme, and Oregano
Animal Toxicity: Safe for dogs, cats, and horses.
ASPCA Website, Toxic and Non-Toxic Plants “Basil”
Medicine Interactions:
Individuals may have a sensitivity or allergies to holy basil, consult a healthcare professional first and proceed at own risk.
◦ Anticoagulant and antiplatelet medicine (Blood thinners): Holy basil may slow blood clotting. Taking holy basil with medications intended to slow blood clotting may increase the risk of bruising and bleeding.
◦ Diabetes medication: Taking holy basil along with diabetes medications might cause blood sugar to drop too low. Monitor blood sugar closely.
◦ Pentobarbital (Nembutal): Pentobarbital causes drowsiness. Holy basil seed oil with pentobarbital might cause excessive drowsiness.
WebMD Website Holy Basil “Interactions”
Use and Harvest⚕️🌾
❗Never ingest essential oils, instead use organic fresh or dried herbs.
Use: Holy basil is an adaptogen, a natural substance that helps the body adapt to stress and promote mental balance. Eaten raw or cooked, added to salads, used as a flavoring, or made into tea. Holy basil may act as a natural mouth freshener and disinfectant to cure mouth ulcers and protect teeth.
◦ Flowers: Mild flavor, not as pungent as leaves, may be used for potpourri, dried herbs, pickled, or garnishes. Mild medicinal properties.
◦ Leaves: Most medicinal part of the plant. Culinary uses are for sauces, marinades, stir-fry, soups, salads, dressings, flavored salt, flavored oil, and garnishes. Externally applied in the form of herbal oil, poultice, salve, cream, or therapeutic tea soak.
◦ Essential Oil: Click Here for Precautions, Instructions, and Dilution Ratios
Benefits: Antioxidant, antibacterial, antidisease, antimicrobial, antiviral, antifungal, anticancer, anti-inflammatory, prevents and fights infection, relieves swelling, colds (flu or influenza), fever, diabetes (high blood sugar or ‘hyperglycemia’), hypertension (reduces high blood pressure), lowers cholesterol, blood thinner (reduces blood clots), relieves indigestion, sinusitis, respiratory tract infection (bronchitis, chest congestion, pharyngitis, and whooping cough), asthma, arthritis, rheumatism, stress, headache, cough, diarrhea, dysentery, gastric ailments, flatulence (farting), and spasms. Occasional limited use may improve heart conditions (cardiovascular health).
Dosing: 1 teaspoon of dried herb or 1 to 2 teaspoons fresh herb every other day for adults, using irregularly for tea or to add flavor to meals. Use for 2 to 3 weeks, then stop use for 2 weeks prior to continuing use. 1 teaspoon of fresh holy basil contains a low amount of vitamin K, which supports blood health and bone strength.
Click Here for How To Harvest, Dry, and Properly Store Herbs and Seeds
Harvest: Never harvest more than 20% of a plant’s leaves or roots!
◦ Flowers: Harvest any time
◦ Leaves: Harvest any time, primarily Mid Spring to Late Summer
◦ Seeds: Harvest the dry, brown, crunchy flowers from Summer to Fall. Follow harvesting techniques in the link above to extract and properly store the seeds.
Aroma, Flavor, and Culinary Combinations🧼🍴
Note: The flowering stage may cause leaves to be more bitter. Drying the leaves slightly reduces flavor.
Aroma: Spicy, sweet herbaceous aroma with a hint of clove
Flavor: Mildly sweet basil with strong notes of peppery mint and clove
Culinary Combinations: Holy basil compliments herbs and spices (thyme, rosemary, mint, oregano, cilantro, parsley, cinnamon, nutmeg, sage, rose, chamomile, goldenseal, hibiscus, lavender, cardamom, coriander, tarragon, chives, turmeric, and ginger), quinoa, whole wheat enriched pasta, wild rice, beans (sugar snap peas, green beans, chickpeas [garbanzos], black, pinto), legumes (lentils, mung beans), tofu, tempeh, mushrooms, nuts (roasted cashews, almonds, walnuts, pecans, and pine nuts), vegetables (arugula, cabbage, broccoli, cauliflower, Winter squash [pumpkin, butternut squash, acorn squash], Summer squash [zucchini, straightneck, and crookneck], sweet potato, red potato, white potato, eggplant, zucchini, garlic, lemongrass, bell pepper, carrot, beet, asparagus, brussels sprouts, radish, tomato, and cucumber), and fruits (avocado, raspberries, blackberries, cranberries, apricot, mango, and citrus [lemon and lime], figs)
Click Here to explore a comprehensive list of vitamins, minerals, and nutrients with function explanations, deficiency or excess symptoms, and vegan food source rankings (high, medium, low)
History 📜
Holy basil has been used in India for around 5,000 years and is a central part of many herbal traditions. It is native to the eastern world tropics and is thought to have originated in north central India. Caring for a holy basil plant is believed to bring happiness and prosperity, and to serve as a reminder of the connection between the spiritual and earthly realms.
Lifespan⏳
1 year to 4+ years longevity for life expectancy.
