Life cycle of a tea plant
In tea plantations, every single tea bush or tea tree is cared for, tended, and treated meticulously. This is to ensure that the tea plants can grow to fulfil their full potential, season after season, to produce the best quality teas.
Each tea plantation or farm has their own unique process, many of which have traditions, knowledge, and methods passed down from generation to generation.
A tea farmer’s job is no easy feat. They have various key responsibilities, such as
to ensure that the surrounding soil is enriched and fertilised appropriately, so that the roots of the tea plants can grow strong and deep,
keeping the soil clean and pollutant free,
pruning the tea plants at appropriately determined intervals,
pest control,
or even removing old, sick, or damaged tea plants.
A Task for Every Season
Most tea gardens are located in places where there are seasonal changes. A tea harvested in spring can taste very different from one harvested in summer. Hence, tea plantations have to decide carefully when they should schedule pruning and harvesting to accommodate the growth of tea leaves according to the season.
Spring (First Flush)
*one point to note: not all tea regions use the “flush” system, but we have included them here as this is a commonly used term within the tea community. The “flush” system is more common in Darjeeling, Assam, Nepal, and Sri Lanka.
Ask any tea lover which harvest they wait for all year, and most might give the same answer, first flush.
The first flush refers to the very fist plucking of the season, usually during late February to early April, depending on the region. The first flush comes right after the long winter period of dormancy. (more below)
It is this process of dormancy that produces the best teas that are famously expensive and highly sought after.
Come early spring, when temperatures rise again, the plant awakens and pulls all its stored reserves up from the roots and pushes them into new buds and young leaves. These buds and leaves make the first flush.
They are exceptional for a few reasons:
high in amino acids, especially L-theanine
L-theanine is what makes tea umami and smooth, and puts you in a “calm alert” state
low in tannins
tannins are what make teas bitter and astringent
tannins are produced increasingly as leaves mature and are exposed to more sunlight
therefore first flush shoots contain much less tannins, especially the ones that are shaded by older leaves
first flush teas are generally more delicate, sweeter, and less harsh tasting
concentrated sugars
the carbohydrates stored in the roots over winter are converted into simple sugars and sent upward
this makes first flush teas sweeter
smaller, tender leaves
first flush shoots are typically “two leaves and a bud”, which are the youngest, softest parts of the plant
they contain less fibre and more sap than mature leaves
when brewed, they release flavours quickly to produce a light, bright liquor
Summer (Second Flush)
As the summer season begins, the warmer weather speeds up growth. Leaves start to develop more tannins and bolder flavours. While first flush gets most of the attention (and the highest prices), second flush teas have a loyal following of their own, especially among drinkers who find spring teas too subtle or light.
The tea plant goes through the following:
warmer temperatures, which increases the plant’s metabolic rate
enzymes work faster
new shoots emerge every 7 to 10 days
longer, stronger sunlight, which means more photosynthesis
the plant produces more carbohydrates, and these carbohydrates are used immediately for growth
less reliance on roots
by this point, the plant has already used most of its stored winter amino acids for the flirst flush
new growth relies on photosynthesis
this means fewer amino acids (less umami) and more tannins (more astringency and bitterness)
faster maturation
summer shoots grow from bud to full leaf in days, and they tend to be larger, thicker, and tougher than first flush shoots
these shoots have more fibre, resulting in a heavier, more full-bodied, robust flavour
Summer is especially suitable for Assam and black teas, as they have a characteristic bold and intense flavour.
A common misunderstanding that the summer teas or second flush teas are of lower quality, but this is not true at all. They are just different. Spring teas are about subtlety, complexity, and umami, while summer teas are about bolder, full bodied flavours. In fact, many tea experts argue that a great second flush tea is harder to produce than a great first flush. The timing has to be perfect, as too early a harvest will produce teas that lack its characteristic sweetness, and a harvest that’s too late produces teas that are harsh and flat.
Monsoon season
The monsoon season may be a tea farmer’s toughest season yet. During monsoon season, the tea plant grows rapidly but the leaves are much less flavourful. Monsoon teas rarely appear on specialty tea menus. They are not prized and not expensive, but they play a crucial role in the tea industry in helping tea farmers survive.
The monsoon typically arrives from June to September, especially in tea growing regions in India, Sri Lanka, Nepal, and parts of China.
During the monsoon season, the tea plant
goes through explosive growth
warm temperatures + unlimited water = rapid growth
new shoots appear every 4-5 days, much faster than spring or summer
the plant puts all its energy into leaves and not flavour compounds
has diluted chemistry
as the plant takes up large amounts of water, the concentration of flavour compounds (like tannins, amino acids, sugars) drop significantly
the leaves become high in volume but low in taste
has high moisture content
freshly plucked monsoon leaves can be 80-85% water, compared to 70-75% in spring
processing becomes more difficult as leaves take longer to wither and are prone to mold
faces through pest and disease pressure
humidity invites trouble!
fungal infections, root rot, pests thrive in monsoon conditions
farmers must be vigilant or risk losing entire sections of the plantation
Monsoon harvest teas generally taste not so great. It is usually flat and dull, less aromatic, slightly woody or grassy, and more astringent.
Having said that, monsoon teas are still not bad teas. They are just simple teas with their own unique uses, such as
tea bags, especially supermarket brands
yes, that includes a lot of the commodity tea bags that you see!
these are affordable, consistent, and just takes a splash of milk and some sugar to taste good
as fillers in blends
some tea companies opt to blend in small amounts of monsoon tea to lower costs without dramatically changing flavour
for example, a “breakfast blend” may use 70% second flush Assam and 30% monsoon Assam
instant tea powders
such as in bottled iced teas, powdered tea mixes, and some bubble tea bases
flavour is added later so the tea base just needs to exist instead of tasting special
lower grade CTC tea
CTC (crush-tear-curl) tea, which are small, granular teas used in most Indian chai, is often made from monsoon leaves
If monsoon teas aren’t considered as premium, why don’t tea farmers just skip them entirely?
The reasons are simple.
Firstly, tea farmers still rely on them for income. Tea farmers cannot afford to go three months without zero harvest. Monsoon teas can still bring in essential revenue during the slow season.
Secondly, for the sake of plant health. Harvesting during monsoon season ensures that tea plants do not get overgrown. The leaves get huge, woody, and bitter. Taking these leaves off do more good than harm.
Thirdly, the continuous harvest disrupts weed growth and pest breeding cycles. A plantation that stops harvesting for three months can turn into a mini jungle, which is much harder to bring back into production.
Autumn
After the rains end and before the winter dormancy begins, there is a narrow window of calm, cool weather. This is the autumn harvest, the often overlooked middle child that is quietly capable of producing some of the most aromatic and satisfying teas of the year.
Autumn teas do not enjoy the same hype of spring, nor the muscle of summer. But for tea drinks who find spring teas too delicate and summer teas too bold, autumn teas usually hit the sweet spot.
During autumn, the tea plant
goes through slower growth
cooler temperatures slow the plant down
new shoots once again take 10 to 14 days to emerge, giving them more time to develop flavour compounds
produces stress induced aromatics
the plant senses the approaching winter
it produces more volatile aromatic compounds (that makes floral, fruity, and spicy notes) as a form of protection
this is similar to how some fruits become sweeter and more fragrant as they ripen before cold weather
has balanced chemistry once again
autumn leaves are an in between of spring and summer leaves
they have moderate tannins, moderate amino acids, and higher aromatic oils than any other season
the resulting tea is flavourful but not harsh, aromatic but not subtle
has firmer leaves
autumn leaves are thicker and more durable than spring leaves but not as tough as monsoon leaves
this makes them easier to process and ship with much lesser damage
Autumn teas are the best in value. They are often 30-50% cheaper than spring teas, yet delivers 80-90% of the enjoyment. If you are a daily drinker looking for quality without the price tag, autumn tea is your answer.
Winter dormancy
Winter is the season of nothing happening, and that nothing is absolutely essential. Without winter dormancy, there would be no first flush. No umami. No sweetness. Imagine that!
The tea plant now enters deep sleep. While the tea plant appears to be doing nothing at all, it is actually entering somewhat of a survival state as temperatures drop and daylight shortens.
During dormancy, the tea plant
stops growing completely
no new leaves or shoots appear
the plant’s above-ground growth freezes in place
existing leaves may turn darker, curl slightly, or even fall off
moves its carbohydrates, sugars, and amino acids store downwards from the leaves to the roots
slows down metabolism to help itself conserve energy to survive frost, wind, and low sunlight
decreases water content in the leaves to prevent frost damage
goes through cold hardening in frost-prone areas
this is done so by producing natural antifreeze compounds to protect its cells from ice crystal damage
these compounds later contribute to flavour complexity
expands its root system
while the top of the plant rests, the roots keep growing
a tea plant’s root system can extend 2-3m deep over its lifetime, and it usually strengthens its root network during winter
A dormant tea plant is essentially hibernating. It stockpiles resources throughout winter, and this is what makes the first flush exciting. Without dormancy, spring teas might just taste more similar to summer teas!
There are 3 specific chemical changes that contribute to the remarkable characteristics of spring teas:
L-theanine accumulation
L-theanine is produced in roots and stored there during winter
in spring, it floods into new shoots
a plant that doesn’t experience true dormancy (for example in tropical regions with no cold seasons) produces less L-theanine
increase in sugar concentration
simple sugars (glucose, fructose, sucrose) accumulate in roots
these are natural sweeteners
they also participate in the Maillard reaction during processing (especially in black teas and roasted oolongs) to create toasty, nutty, and caramel notes
reduced catechins
catechins are the culprit behind bitterness
the low levels of catechins carry into early spring shoots
Do all tea plants go dormant?
As mentioned above, dormancy depends on the region.
Tea plants in these regions go through full dormancy (cold winter):
Darjeeling (China variety sinensis)
Japan (most green tea regions)
China (northern and high-elevation gardens)
Nepal (higher elevations
Korea
Tea plants in these regions go through partial dormancy (mild winter):
Taiwan (some high mountain oolongs experience reduced growth)
Northern India (lower-elevation gardens)
Sri Lanka (high grown Nuwara Eliya has a cool season)
And tea plants in these regions do not go through dormancy (tropical):
Assam (India’s low elevation tropical region)
Kenya
Southern India (Kerala, Karnataka)
Indonesia
Vietnam (low-elevation gardens)
The tea plants in regions that do not go through dormancy can harvest year-round but they can never produce true “first flush” tea. Their spring harvest is simply the dry season harvest, good in its own ways but chemically different. This is why Assam tea is bold and malty, and not delicate and umami. The plant never stores significant reserves because it never stops growing.
What do farmers do during winter then?
While the plant rests, the farmers… keep working!
Major pruning, collaring, or rejuvenation cuts
winter is the time for heavy pruning
farmers cut bushes back to 30-50cm above ground
they remove old, woody growth
the plant will spend spring recovering and producing new, tender shoots
Soil enrichment
compost, manure, organic fertilisers are added to the soil
with no leaves to harvest, nutrients can soak in slowly over winter
Pest management (dormant season treatment)
farmers apply dormant oils or remove infested branches to reduce sprint pest outbreaks
Tool and equipment maintenance
they sharpen their spears, repair their processing machines, clean drying racks and withering tables
basically a hard reset
New planting
bare-root seedlings / cuttings are planted
the cool and moist conditions help roots establish before spring growth begins
From seed to shoot
Now that we have explored a tea plant’s cycle through seasons, we will look at the full timeline of a tea plant.
Year 0-1: Germination and nursery
Tea plants begin as seeds or cuttings. They spend their first year in nurseries, protected from direct sun and wind.
Only healthy seedlings are selected for planting.
Year 2-3: Planting
The young tea plants are transplanted to the field. They will not be harvested. Farmers focus on watering, shading, and light pruning to encourage deep root growth and a wide, flat plucking surface.
Year 4-5: First light harvest
The plant is now mature enough for its first small harvest. Yield is intentionally kept low to let the plant continue developing. Teas from this stage are often referred to as “young bush” and can taste quite delicate.
Year 6-50: Prime production
This is the golden age of a tea plant. With proper pruning, the bush continuously produces new shoots.
Year 50-80: Maturation and slowing down
Yields begin to decline. Some old bushes are left to grow into tall, untrimmed tea trees (commonly seen in Yunnan). These ancient trees produce leaves with deeper, more complex flavours, but exist in much smaller quantities.
Year 80-100+: Legacy trees
Some tea plants can live over a century. These are revered as heritage trees and their leaves are hand plucked by climbers and sold at premium prices.
Some wild tea trees in China are estimated to be over 1000 years old!
Pruning
By now, you may have realised that an important part of a tea plant’s life cycle is pruning. Farmers do this year after year and season after season. It is one of the most important human interventions in a tea plant’s life.
Farmers prune the plants by a few methods:
Light pruning
remove just the told few inches
done every 1-2 weeks during harvest season to maintain a flat plucking surface
Medium pruning
cutting back to 10-15cm
done annually or bi-annually to remove woody stems and encourage fresh growth
Heavy pruning
cutting the tea plant to 30-50cm above ground
done every 3-5 years to rejuvenate an ageing plant
Rejuvenation prune
cutting almost to ground level
last resort for old or diseased plants
bush takes a full year to recover but can continue to produce for about a decade after
Without pruning, a tea bush grows into a tall, scraggly tree (there are exceptions like the legacy trees), and the leaves become large, tough, and bitter. With pruning, it stays waist-height, bushy, and productive.
When a tea plant dies or is retired
A tea plant doesn’t live forever.
Farmers know when a bush has given its last good harvest. Signs include:
very low yield despite proper pruning
persistent disease or pest infestation
woody, unproductive center with sparse outer growth
When these happen, the bush is uprooted. The ground is left idle for a season or two. Sometimes, farmers plant nitrogen-fixing cover crops to help restore the soil. A new seedling from the nursery then takes its place after.
Some plantations choose to leave old trees standing as living monuments and a quiet reminder of the cycle that continues, season after season, cup after cup.
The tea plant is truly one of nature’s greatest gifts
From a single seed in a nursery to a century old heritage tree, the life cycle of a tea plant is measured in decades, not days. Every tea plant that you see on a plantation has been pruned, protected, and patiently tended through countless seasons. The leaf that ends up in your cup carries with it not just flavour, but the accumulated decisions of generations of farmers, from the time to prune, to when to pluck, for when to let the land rest, to uprooting of an aging tea plant to make room for the next generation.
So the next time you brew a pot of tea, pause for a moment. You are not just drinking a beverage. You’re tasting a cycle, one that began years before you were born, and with proper care, will continue long after this cup is empty.
