Shrub · Theaceae
Tea
Camellia sinensis
Give this forgiving evergreen shrub acidic soil, dappled shade, and steady moisture, and it will grow the very leaves behind your cup of tea.
Partial shade
Every 5–10 days
USDA 7–9
3–7 ft · 0.9–2 m
Overview
Every cup of tea starts with one friendly evergreen shrub, Camellia sinensis, and it is the same plant behind green, black, and oolong. Think of it as a close cousin of the garden camellia, sharing that same love of acidic soil and dappled shade. Left alone it can grow taller than you, but there is no pressure there, since most growers simply keep it trimmed to a low, leafy hedge.
Tea takes its time, and that is part of its charm. Fresh growth arrives as soft flushes of a bud and the top two leaves, and those tender tips are exactly what you will pick. Come fall you get a lovely surprise: fragrant white flowers on a shrub you grew mostly for its leaves.
Do not let the tropical reputation worry you, because tea is tougher than it looks. The China type shrugs off light frost once it settles in and thrives outdoors across USDA zones 7 to 9, and where winters bite harder you can simply grow it in a pot and bring it inside. Get the soil acidic and the drainage right, and honestly the rest is just happy waiting.
Care
The short version: give it part shade and acidic, well-drained soil kept evenly moist, feed it with a seasonal acid fertilizer, and prune in late winter to keep it at a comfortable picking height.
Light
Tea is happiest in part shade, the soft dappled light you find beneath taller trees. In cooler climates it will gladly take more sun, and it can handle full sun as long as the roots stay moist, but do protect it from harsh afternoon glare in a hot spot, which can scorch the leaves.
Water
Aim to keep the root zone evenly moist but never waterlogged, which usually means watering every 5 to 10 days, and a little more often during a dry spell or when the plant is flushing new leaves. A cozy layer of mulch helps hold that moisture in for you. Just steer clear of soggy ground, since that is the quickest path to root rot.
Soil
This is a true acid lover, and it feels most at home in well-drained, organic-rich loam sitting at a pH of 4.5 to 6.5. Work in plenty of organic matter to get it started, and avoid any low corner where water likes to gather.
Temperature
Once it is established, tea copes with a surprisingly wide range, from about 5°F to 86°F (-15°C to 30°C). The China type takes light frost in stride, though a hard freeze can nip tender new growth, so give young plants a little shelter or tuck pots under cover during the coldest snaps.
Humidity
Average humidity of 40% to 60% is all it asks for, which matches most temperate gardens just fine. Outdoors there is no number to fuss over, but if you keep a plant inside it will thank you for a little extra moisture in the air.
Feeding
Feed seasonally from spring through summer while the plant is actively growing, reaching for an acidic azalea or camellia fertilizer. That gentle feed keeps the soil in the acidic range the roots love and helps along the leaf flushes you will be picking.
Pruning
A trim in late winter to early spring keeps the plant at an easy, workable hedge of around 90 to 120 cm. Pinching back the young flushes through the season is a two-for-one gift, tidying the shape while handing you the very leaves that become tea.
Repotting
A potted tea likes a fresh, roomier home every 2 to 3 years, or a little sooner if you notice roots circling the pot, poking out the drainage holes, or water rushing straight through. Growth that stalls is another gentle hint that it is time for fresh acidic mix and a bigger pot.
Size & spacing
As a hedge, tea grows 3 to 6.5 feet (90 to 200 cm) tall and almost as wide, spreading out to 3 to 5 feet (90 to 150 cm). Give each plant that bit of room so air can move freely around it and pruning stays nice and easy.
When to plant
There is no rush with tea, since it grows slowly and on its own gentle schedule. Start seed or cuttings in late winter, move young plants outdoors in spring once frost has passed, and pick the young leaf flushes from spring through summer. The pretty white flowers show up in fall as a reward for your patience.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: late winter in a warm propagator
- Plant: spring after the last frost
- Harvest: Fragrant white flowers in fall; harvest young leaf flushes (bud and top two leaves) from spring through summer.
Hardiness
USDA hardiness zones: 7–9
Temperature: down to -18°C
Troubleshooting
Most tea troubles are easy to spot and easier to fix, and they usually come down to soil that has drifted out of the acidic range or stayed too wet, with scale insects a far less common worry. A quick look at the leaves and roots tells you what is going on. Find your plant's symptom below and act early, and it will bounce right back.
Wilting and dieback where the ground stays wet
When soil never drains and the roots sit in water, root rot takes hold, and you may notice the plant sagging a bit more after every heavy rain. Gently check the roots for dark, mushy patches to be sure. Sadly a badly affected plant cannot be saved, so lift it, sort out the drainage, and replant where the water can move on through.
Fix:
- Improve drainage and stop overwatering
- Remove and discard severely affected plants
- Replant in raised or amended well-drained beds
Yellowing leaves with veins that stay green
What you are seeing is interveinal chlorosis, and it simply means the soil has crept too alkaline for the plant to draw up iron and manganese. The fix is friendly: lower the pH with elemental sulfur or an acidifying feed, then tuck pine bark or pine needles around the base to hold it there. A little chelated iron greens up the new growth quickly while the soil settles into place.
Fix:
- Lower soil pH with elemental sulfur or an acidifying fertilizer
- Apply chelated iron for quick correction
- Mulch with pine bark or pine needles
Sticky leaves with a black film and tiny bumps below
Tea scale and its relatives settle on the leaf undersides and ooze honeydew, which then darkens into sooty mold. Turn a leaf over and look for little white or brown bumps near where it joins the stem. Treat with horticultural oil at the label rate, snip away the worst branches, and let helpful predators clean up whatever is left.
Fix:
- Treat with horticultural oil following label rates
- Prune out heavily infested branches
- Encourage natural predators
Toxicity
The leaves are perfectly safe for people and the whole reason this plant is grown, but they carry the same caffeine and theobromine as the drink in your mug. Those stimulants are rough on animals, so gently keep cats, dogs, horses, and other pets away from the foliage. Be extra watchful with brewed tea, dried leaves, and used grounds, which are much stronger.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds
Safe for
People
Cats Caution
Those leaves hold the same caffeine and theobromine as your cup, and cats are sensitive to both. A single nibble may pass quietly, but a bit more can bring on vomiting, restlessness, a racing heart, and tremors, so keep curious cats away.
Dogs Caution
A dog that chews the leaves takes in caffeine and theobromine, the same stimulants that make chocolate a problem. After a larger mouthful, keep a gentle eye out for vomiting, hyperactivity, a fast heartbeat, and shaking.
Horses Caution
Horses do not handle caffeine well, so it is kindest to keep them away from the hedge. Nibbling the leaves can leave a horse jittery, with a quickened pulse and muscle tremors.
Rabbits Caution
The same methylxanthines that bother cats and dogs affect rabbits too, and a small animal needs only a little to feel the effects. Keep the plant safely out of reach rather than risk a racing heart or the jitters.
Livestock Caution
Cattle, goats, and sheep are better off not browsing tea foliage, since the caffeine can upset the gut and set the heart racing. A simple fence keeps grazing animals away from the shrubs.
Birds Caution
Birds are especially sensitive to caffeine, and even a small piece of leaf can overstimulate a little body. Keep pet birds well clear of both the plant and any tea left sitting out.
People Leaves safe
This is the friendly plant behind your morning cup, and its leaves are picked, processed, and brewed with no trouble at all. For people the caffeine is the whole point, not a hazard.
Keep brewed tea, dried tea leaves, and used grounds well out of reach of pets, as these are the most concentrated and dangerous forms.
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
Almost all tea comes from just two varieties of this one species, along with a few selections chosen for their cold tolerance. Here are the ones worth getting to know.
var. sinensis
The hardier China type wears smaller leaves and copes well with cooler climates, and it gives you both green and black teas.
var. assamica
The big-leaved Assam type hails from warm, tropical country and goes mostly into black tea.
'Sochi'
A cold-hardy Russian selection, 'Sochi' is the one to reach for when you want to grow tea in a temperate garden.
Companions
Tea grows best among the other acid-loving shrubs that want the same soil and the same dappled light.
Plant near
Azalea: Shares the same acidic, well-drained soil and part-shade preferences.
Camellia japonica: Same Theaceae cultural needs for acidic soil and dappled shade.
Rhododendron: Acid-loving understory shrub with matching light and moisture requirements.
How to propagate
You can raise tea from cuttings or from seed, and while neither is fast, both are well within reach. Each one takes a few years to grow to a size you can harvest, and cuttings give you a plant you can count on.
Stem cuttingsModerate
Late summer from semi-hardwood growth · Several months to root, then 2-3 years to harvestable size
Cuttings are the reliable path, so start there. Take semi-hardwood pieces in late summer, dip them in rooting hormone, and settle them into a warm, humid medium. They need several months to root, and the young plant wants 2 to 3 years before it grows big enough to pick from, but the wait is worth it.
SeedModerate
Sow fresh seed in late winter to spring · Germinates in weeks; plants take about 3 years before leaf harvest
Seed works too, though the results wander a little. Soak fresh seed and sow it from late winter into spring, and it will sprout within weeks. Because seedlings differ from one another, most growers lean on cuttings for matching clones, and either way you will wait about 3 years before that first leaf harvest.
Myths
Green tea and black tea come from different plants.
Both actually come from the very same shrub, Camellia sinensis. The difference is all in the processing, with black tea left to oxidize fully and green tea barely oxidized at all.
The tea plant is strictly tropical and cannot survive frost.
Happily, tea is an evergreen shrub that is hardy to about USDA zone 7 and takes light frost in stride once it has settled in. The Assam type does prefer warmth, but the China type and selections like 'Sochi' do beautifully in a temperate garden.