Shrub · Theaceae
Tea Plant
Camellia sinensis
Hand it acidic soil, part shade, and steady moisture, and Camellia sinensis grows the leaves behind every cup of tea.
Partial shade
Every 3–7 days
USDA 6–9
6–15 ft · 1.8–4.6 m
Overview
Ever wondered where tea actually comes from? It's this shrub, Camellia sinensis, a member of the camellia family that fills in slowly as a dense evergreen. You'll get glossy leaves and small fragrant white flowers that show up in fall and hang around into early winter. Leave it be and it'll grow toward small-tree size, but there's nothing stopping you from keeping it low and bushy.
It's pretty clear about what it wants: acidic, organically rich soil and a spot with part shade, though it'll take more sun wherever the ground stays moist. Depending on the type you go with, it's hardy from zone 6 to zone 9, so a proper winter isn't necessarily a dealbreaker. It grows slow and steady, and a few years of patience really do pay off.
Here's the fun part, though: the harvest. Pick the young leaves and buds in spring, process them at home, and one shrub can turn into green, white, oolong, or black tea, all depending on how you handle the leaf. Keep that soil acidic and evenly moist and a single plant can keep you in tea for decades.
Care
The short version: part shade, acidic and organically rich soil kept evenly moist, a light spring feed with an acid-forming fertilizer, and a yearly prune so the new leaves keep coming.
Light
Tea plants are happiest in part shade, which is a lot like the dappled light they'd get back in the forest. They'll handle part to full sun where the soil stays reliably moist, but harsh, dry sun? That just stresses the leaves and the buds, so don't push it.
Water
Keep the soil evenly moist but never waterlogged, because soggy roots are basically an open invitation for rot. A 2 to 3 inch layer of mulch holds moisture between waterings, and a dry summer spell is exactly what makes the flower buds drop, so don't let it go thirsty when it's hot.
Soil
This one's an acid lover, so give it organically rich, well-drained loam with a pH of 5.0 to 6.0. Work in plenty of organic matter, and if the leaves start yellowing, that's your sign the ground has crept too alkaline.
Temperature
It's tougher than you'd think, handling anywhere from 0°F to 100°F (-18°C to 38°C) once it's settled in. The hardier Chinese type takes the cold end better than the tender Assam type, so match the type to your winters.
Humidity
Regular outdoor humidity is plenty, so there's no number to chase here. What matters more is airflow, because still, damp air around crowded leaves is what gives scale and flower blight a way in.
Feeding
Feed it lightly in spring with an acid-forming azalea or camellia fertilizer. One seasonal feed is all this slow grower needs, and a soil test will tell you if it actually wants more.
Pruning
Prune after flowering to shape it, and for a steady leaf harvest, cut it back to 4 to 5 feet right before spring growth to push out fresh shoots. Hard cutbacks? Totally safe from late winter into early May.
Repotting
A potted plant needs moving up roughly every 3 years. Repot when you spot roots circling or slipping out the drainage holes, growth slowing down, or the plant just plain outgrowing its pot.
Size & spacing
Left alone, the shrub gets to 6 to 15 feet (1.8 to 4.5 m) tall and spreads 4 to 8 feet (122 to 244 cm) wide, though most folks keep it well under that to make picking easier. Give it room to match whatever size you're planning to keep it at.
When to plant
This one's in no hurry, and that's fine. Pop young plants in the ground in spring or fall if your climate's mild, watch the white flowers open from fall into early winter, and start picking the fresh young leaves and buds in early spring once the new growth shows up.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: spring or fall in mild climates
- Harvest: fragrant white flowers fall to early winter; young leaves and buds harvested for tea beginning in early spring
Hardiness
USDA hardiness zones: 6–9
Temperature: down to -23°C
Troubleshooting
Most of the time, tea plant trouble shows up on the leaves, the flowers, or the roots. Here's the thing: the cool, damp conditions camellias love are the same ones pests and fungus love, so catch the early signs below and match them before anything spreads through the shrub.
The whole shrub yellows and starts to wilt
When a plant yellows all over and slides downhill after a wet spell, think Phytophthora root rot. Dig down and check the roots, which turn red-brown to dark brown instead of staying white. There's no cure once it's in, so pull the badly hit plants, fix the drainage with raised beds, and protect the rest with a mefenoxam drench.
Fix:
- Improve drainage and avoid waterlogged sites; use raised beds
- Remove severely affected plants since fungicides will not cure established infection
- Apply mefenoxam preventatively to protect remaining healthy plants
Yellow spots up top, cottony white stuff underneath
See yellow blotches above with a cottony underside? That's tea scale, an armored sap-sucker that hides on the leaf undersides. Flip a leaf and you'll spot the dark females and smaller white males packed into a cottony mat. Scrape or prune off the light patches, then hit it with horticultural oil in late winter and insecticidal soap once the crawlers get moving.
Fix:
- Hand-scrape or prune out lightly infested leaves
- Apply 2% horticultural oil in late winter to early spring
- Use insecticidal soap during crawler activity
- Apply systemic dinotefuran or contact acephate/bifenthrin for heavy infestations
A flower that browns out in a single day
When a bloom browns from a few small spots in 24 to 48 hours, that's camellia petal blight, a fungus and not just cold. The dark veins running through the ruined petals are how you tell it apart from cold damage. Pick off and destroy every infected flower, rake up the fallen ones, and freshen the mulch so the fungus has nowhere to overwinter.
Fix:
- Promptly remove and destroy all infected flowers
- Rake up fallen blooms and debris and replace surface mulch
- Apply mancozeb sprays or soil drenches in late December through January where blight is established
Yellow leaves, but the veins stay green
If the leaf yellows while the veins stay green, that's chlorosis, and it's almost always because the soil has drifted too alkaline for this acid lover to pull up iron. A magnesium shortage can do it too. Test the soil, then push the pH back down and add iron chelate, and save the Epsom salt for when a test actually confirms a magnesium gap.
Fix:
- Lower soil pH toward acidic range for this acid-loving plant
- Apply iron chelate to correct iron-related chlorosis
- Apply Epsom salt solution (1 tablespoon per gallon) if magnesium deficiency is confirmed by soil test
Toxicity
Good news first: this is the plant tea comes from, and the picked leaves are perfectly safe for people. The catch? Caffeine. A fair amount of the fresh leaves can mildly upset cats, dogs, and horses, and brewed tea, tea bags, and dried leaves are a lot more dangerous to pets than the living shrub. Just keep all of those somewhere an animal can't get to them.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds
Safe for
People
Cats Mild
The fresh leaves have caffeine in them, so a cat that nibbles a bunch might get restless, drool, or end up with an upset stomach. Brewed tea and tea bags are the real danger, though, so keep those well out of reach.
Dogs Mild
A dog that chews more than a leaf or two can go jittery, start panting, and bring its food back up, all from the caffeine. Dried leaves and a forgotten mug of tea pack the biggest punch, so clear them away.
Horses Mild
Munching a bunch of leaves can leave a horse wound up and off its feed thanks to the caffeine. Most horses won't touch the bitter shrub anyway, but it's worth fencing off from a bored one.
Rabbits Caution
There's no clear safety record for rabbits eating tea leaves, and honestly the caffeine gives you no reason to risk it. Keep the plant and any dried leaves away from them.
Livestock Caution
Cattle, goats, and sheep usually skip the bitter foliage, but a hungry animal eating a lot could feel the caffeine. Fence it off where stock graze close.
Birds Caution
Birds are tiny and react sharply to caffeine, so keep them away from the leaves and nowhere near brewed tea. Just treat the shrub as off limits for pet birds.
People Safe
This is the plant behind every cup of tea you've had. The young leaves and buds get picked, dried, and brewed for people with no trouble at all.
The plant itself is non-toxic, but the harvested, dried/processed tea leaves and brewed tea contain caffeine and theobromine (methylxanthines) which are toxic to pets in quantity; do not let pets consume brewed tea, tea bags, or large amounts of dried leaves.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
United Kingdom
Animal PoisonLine: 01202 509000 (fee applies)
Australia
Animal Poisons Helpline: 1300 869 738
Varieties
Tea really comes down to two main types of plant, and the one you grow decides both how much cold it'll take and what kind of tea its leaves are best for.
Camellia sinensis var. sinensis
The small-leaved Chinese type is the cold-hardy one, hanging on into USDA zone 6, and its tender young leaves and buds are what go into green and white tea.
Camellia sinensis var. assamica
The large-leaved Assam type from northern India is the more tender of the two, happier in zone 7 and south, and its older leaves end up in oolong and black tea.
How to propagate
Want more tea plants? You can go from cuttings or from seed, and the two paths basically swap speed for certainty in opposite directions.
Stem cuttingsModerate
Summer, using semi-hardwood new growth · Several weeks to months to root
Cuttings get you an exact copy of a plant you like, which is handy. Take semi-hardwood pieces of this season's growth in summer and root them under humid cover, and they'll settle in over several weeks to a few months.
SeedModerate
Sow fresh ripe seed in fall · Slow; seedlings take about 4 years to begin flowering
Seed's the slow road, and the unpredictable one too, since seedlings won't match the parent. Sow fresh ripe seed in fall and just be patient, because a young plant takes about 4 years to throw its first flowers.
Myths
The tea plant is the same as those showy garden camellias.
They share a genus, sure, but not a species. Camellia sinensis is grown for the leaves you brew and has smaller fall flowers, while C. japonica and C. sasanqua are the ones planted for big ornamental blooms. Your garden camellias aren't where tea comes from, so you'll want this species if you're after a cup.