Just like wine grapes, the timing of harvest changes everything.
Matcha is no exception.

In Japan, the first harvest of tea leaves — known as first flush — typically takes place from mid-April to mid-May, depending on the region and climate.
These early spring leaves are often associated with a smoother, more balanced flavour.
But this isn’t just tradition or preference — there are real reasons behind it
.

What Is First Harvest Matcha?

First harvest refers to the very first picking of tea leaves in a given year.
After winter, tea plants begin to grow new shoots, drawing on nutrients stored over the colder months.
These young leaves are then carefully harvested in spring — before the plant enters faster, more intense growth later in the season.

The Role of Amino Acids (Especially L-Theanine)

One of the key contributors to matcha’s smooth, rounded taste is L-theanine, an amino acid naturally found in tea leaves.

In general:
- Higher amino acid content → smoother, softer taste
- Lower amino acid content → sharper, more astringent profile

During the slower growth period leading into spring, tea leaves tend to retain a higher level of these amino acids.

This is one of the reasons first harvest matcha is often perceived as:
- smoother
- more balanced
- less harsh on the palate

What Changes Later in the Season?

As the season progresses, sunlight intensity and temperature increase.

This affects how tea leaves develop.

Under stronger light conditions, the balance of compounds in the leaves shifts — with amino acids tending to decrease and polyphenols (such as catechins, associated with bitterness and astringency) becoming more prominent.

As a result, later harvests may have:
- more noticeable bitterness
- a stronger, sharper taste
- less softness compared to earlier harvests

That said, flavour is influenced by many factors — including cultivar, shading, and processing — so harvest timing is just one part of the overall picture.

It’s Not Just About Taste — Colour Matters Too

The way tea is grown — particularly whether it is shaded — also affects its colour.
Shaded tea plants tend to develop higher chlorophyll levels, which contribute to matcha’s vibrant green appearance.
While harvest timing plays a role, colour is more directly influenced by cultivation methods rather than timing alone.

A Familiar Idea — Even Outside Tea

In New Zealand, many people are already familiar with the idea that timing affects flavour.

In winemaking, for example:
- Earlier harvest grapes often show higher acidity and fresher notes
- Later harvest grapes tend to develop more ripeness and body

Matcha works in a similar way.
Understanding when something is harvested can help explain why it tastes the way it does.

A Simple Way to Think About It

• First harvest → generally softer, more balanced
• Later harvests → often more robust, sometimes more astringent

Not better or worse — just different expressions.

Table: How Harvest Timing Affects Matcha

Here’s a simple way to understand how harvest timing can influence the character of matcha:

Final Thoughts

First harvest matcha is often appreciated for its balance and approachability.
Not because it is inherently “superior” in every case, but because of how the leaves develop in early spring conditions.

If you’ve ever noticed differences between matcha powders, the timing of harvest is one of the factors worth considering.

Sometimes, a small detail like when the leaves were picked can quietly shape the entire experience in the cup.

→ Why Matcha Tastes Different in NZ (Water Article)