Camellia sinensis is the plant from which white, green, oolong, black, and pu-erh tea are made. They are not different plants: the tea style depends mainly on what happens to the leaves after harvesting—wilting, rolling, oxidation, and drying. As an ornamental plant, it is an evergreen shrub with glossy leaves and subtle white flowers.
Table of contents
The tea plant and types of tea
The tea plant originates from East and Southeast Asia, where it has been cultivated for centuries. In cultivation, a shrub can be kept at approximately 1–2 m through pruning, making harvesting easier and encouraging branching. Young leaves and buds are the parts harvested most often.
The same plant, four processing directions. After harvesting, the leaf naturally begins to oxidize when its enzymes come into contact with oxygen. The producer decides how long to let this process continue and when to stop it with heat or drying. This is what creates differences in the color, aroma, and body of the infusion.
White tea: It is minimally processed. The leaves and buds are left to wilt and are then slowly air-dried at a low temperature, with little intervention. Oxidation remains light and uncontrolled compared with other types. The infusion tends to be pale, delicate, and have vegetal, floral, or slightly sweet notes. Because it is minimally processed, white tea clearly reveals the quality and freshness of the leaf.
Green tea: The leaf is heated quickly to stop oxidation. In Japan, steaming is commonly used, while in China the leaves are heated in pans or drums; the principle is the same: the enzymes are deactivated before the leaf develops the color and aromas associated with black tea. As a result, the infusion remains greenish-yellow, while the flavor may be vegetal, fresh, marine, or lightly roasted, depending on the heating method.
Oolong tea: It undergoes partial oxidation. The leaves are wilted and then moved, rolled, or shaken in a controlled manner so that their edges oxidize. The process is stopped when the producer reaches the desired profile; some oolongs remain brighter and more floral, while others become riper, fruitier, or more roasted. It is the category with the widest range of styles between green and black tea.
Black tea: It is allowed to oxidize more extensively before drying. After wilting, the leaves are rolled or processed to release their cellular juices, and oxidation is then allowed to progress until the leaf takes on a coppery-brown color. Drying stops the process. The infusion is usually darker, with a fuller body and notes that may range from malt and honey to dried fruit or liquorice, depending on the origin and production method.
What this means for a plant at home: You do not need different Camellia sinensis plants for each type of tea. You can experiment with the same leaves, but safely and consistently processed tea requires clean leaves, controlled drying, and an understanding of each step.
Growing in pots and in the garden
In Romania, growing in a pot is the most controllable option: you can move the plant to a sheltered location in winter and monitor soil moisture more easily. Outdoors, choose a spot protected from strong winds, with acidic soil and good drainage. Young plants need protection during their first few years, especially in areas with cold winters.
Camellia sinensis does not need aggressive intervention to flower or branch. Move it as rarely as possible, allow the roots to establish, and adjust conditions gradually. A plant that has just been repotted or exposed to severe cold should not be harvested heavily.
Light, temperature, and cold
Provide bright light, with gentle morning sun or filtered light. Strong afternoon sun can scorch the leaves, especially when the pot becomes hot. If the foliage becomes discolored or the edges dry out quickly, protect the plant and check its watering.
Cold tolerance varies according to the variety, the plant’s age, the duration of the freeze, and whether the roots are in a pot or in the ground. Do not treat a minimum temperature value as a guarantee: roots in pots are more exposed. Protect the plant from prolonged freezing, cold winds, and repeated freeze-thaw cycles.
Watering, humidity, and fertilizing
Keep the soil lightly moist, not waterlogged. Water when the top layer begins to dry, then allow excess water to drain away. The plant tolerates a brief delay in watering better than water remaining around the roots for several days.
Fertilize moderately only during active growth. A plant with insufficient light or damaged roots cannot use fertilizer effectively; correct the light, drainage, and watering schedule first.
Soil, repotting, and pruning
Use a slightly acidic, airy, well-draining soil mix. Soil mix for citrus and Mediterranean plants is suitable for growing in pots. Repot in spring, when the plant resumes growth, using a pot only slightly larger than the previous one.
Prune the tips after the plant has become established to maintain a compact crown and encourage lateral shoots. Do not prune heavily if the plant is weakened, has just been moved, or has been affected by cold.
Harvesting and preparation
Harvest the terminal bud together with one or two tender leaves from healthy, well-rooted plants. Do not take too many tips at once from a young plant; allow it to develop enough foliage and roots between harvests.
For a simple infusion, you can use fresh or lightly dried leaves. For processed teas, the leaves go through different stages of wilting, rolling, oxidation, and drying. Use only leaves from plants that have not been treated with products unsuitable for consumption. The tea plant is considered a food, not a medical treatment.
Common problems
Yellow leaves: Check the drainage, standing water, and soil acidity. Soil that is too alkaline or compacted can prevent proper nutrient absorption.
Brown edges: These may appear after intense heat, dry wind, an overheated pot, or irregular watering.
Slow growth: This is normal in winter. In spring, check the light, the roots, and whether the soil has remained too wet.
Frequently asked questions
Can I make tea from the leaves of my own plant?
Yes, if the plant is healthy and has not been treated with products unsuitable for consumption. Harvest moderately.
Does it need acidic soil?
Yes. An airy, slightly acidic soil mix helps the roots function properly.
Can I keep the plant outdoors in winter?
It depends on the variety, climate, and protection provided. In a pot, the roots are more exposed to cold; a sheltered location or overwintering indoors is safer.
This article is provided free of charge. To support the research and publication of other guides, you can order the Camellia sinensis tea plant.