I love matcha. Not only the taste, but the feeling: calm focus, a morning ritual that slows me down. Lately that ritual costs more and trusts less. Prices climb. Cafés ration. The tin I used to buy without thinking is now a line item I notice. I still believe everyone deserves a good cup of quality matcha, honest leaf, not luxury only, not powder sold as Japanese when it is not.
This is not a plan to fix the global supply chain. It is smaller. I am growing tea in my apartment, watching the leaves with simple tools, and writing everything down as I go.
On the shortage
Demand grew faster than craft supply. Matcha moved from ceremony to cafés to wellness to social media, all at once. Japan's exports hit records while shaded tencha fields stay finite. Kyoto producers ration sales. Real matcha is slow by design: weeks under shade, stone milling measured in grams per hour, new trees that need years before they are worth much. Heat and frost hit harvests. Farmers age. Pickers are scarce. Auction prices in Uji doubled. The shortage is not hype. It is demand meeting a supply chain that cannot scale like coffee.
On finding plants in the United States
Before I could grow anything, I had to find the plant. That turned out to be its own kind of shortage. In the U.S. you do not walk into a nursery and choose among rows of named Japanese tea cultivars. You search specialty growers, watch stock counts tick down, and hope someone ships to your state. I wanted Yabukita, the classic Japanese cultivar. I could not get it. It was sold out everywhere I looked.
Camellia Forest had Camellia sinensis 'Yutaka Midori' in four quart pots, roughly two years old. When I ordered, only two were left on the site. I took four in the end (they fulfilled the order), but that moment stuck with me: years of growth in a pot, a name tied to real tea culture, and then almost nothing left to buy. Tea is not fast. Seedlings are cheap. Grown, named plants are scarce because time is scarce. The global matcha crisis starts in Kyoto. The shopping cart is a smaller version of the same story.
On starting with older plants
I did not want to wait five years before my first real harvest. Commercial fields can afford patience. I wanted to practice sooner. Four plants in four quart pots, same corner, same care, so I can compare what changes when I adjust light or humidity.
All tea is the same species. Matcha is not a separate plant. It is process: shade for three to four weeks before pluck, steam, dry into tencha, grind. Growing is half. Processing is where home experiments usually fail. I want to learn both, in public, even if the first powder is rough and honestly labeled: apartment grown, experimental, not ceremonial grade.
On ideal conditions (and bending my apartment toward them)
Matcha country is cool, humid, acidic soil, soft light, then heavy shade before harvest. My apartment is dry air, neutral tap water, one sunny window, and winter heat that runs when I am not looking. I cannot copy Uji. I can build a small microclimate in one corner and measure whether I am close.
- Temperature Aim for roughly 60 to 80°F (15 to 25°C). Avoid long stretches below 50°F. No blasting heat from a radiator directly on the pots.
- Humidity Target 70 to 90%. A humidifier plus grouping the four pots together. This is the main fight in heated rooms.
- Soil Acidic, well drained, pH about 4.5 to 6.0. Azalea or camellia mix, not generic potting soil.
- Light Bright indirect or partial sun while growing. A full spectrum LED bar for steady hours when the window is weak.
- Shade Seventy to ninety percent shade cloth for three to four weeks before a harvest flush, not all year.
- Water Moist roots, never soggy. Drip saucers, finger check, pH meter on soil and water if I am obsessive (I am).
- Air Gentle circulation, no cold drafts from AC. Stability matters as much as the reading on a sensor.
The project is to turn that corner into something like a understory shrub in warm rain: not perfect, but logged. Govee sensors on each pot, Raspberry Pi to watch trends, weekly photos so I see yellowing before it becomes loss. If the numbers and the leaves agree, I will know the apartment is close enough. If they do not, I will know that too.
This will not replace Uji. It answers a quieter question: what does it take to grow shaded leaf at home, and what does real matcha cost in care?
On AI
I am not trying to replace centuries of craft. I want help paying attention. A leaf yellows. Humidity drifts. I would have missed it on a busy week. Near term I will log light, humidity, and soil pH, take weekly photos, track when shading starts and ends, and publish failures. I ordered Govee plant sensors and a Raspberry Pi Zero to pull readings without checking four pots by hand every hour.
Later: nudges when the room is too dry, compare this harvest to the last in pictures, maybe a small model that asks whether a leaf looks stressed. AI lowers the skill floor for careful growing. It does not lower the price of tencha in Kyoto.
Somewhere in week four to six I may buy an electric stone mill, the kind people search as Hakusan matcha stone mill, three hundred to five hundred dollars, if I still have living leaves and the nerve to grind them. That purchase waits on proof that I can keep the plants alive first.