Growing tea Camellias (Camellia sinensis) from seed is very economical and easy to accomplish. And once you have your own plants, you can take cuttings each year when it's time to prune your tea bushes.
There are several sources for seeds. My plants were grown from seeds ordered from Camellia Forest Nursery in Chapel Hill, North Carolina (USDA zone 7b).
Here's a link to their seed page:
https://camforest.com/collections/camellia-seeds
and here's a link to their tutorial on growing camellia seeds:
https://camforest.com/pages/growing-camellia-seeds
This page provides information on choosing the best quality and variety of seeds, what time of year to buy seed, how to store seed, and when to plant:
https://leafhousetea.com/how-to-grow-tea-camellia-plants-from-tea-seed-a-step-by-step-guide/
You can find additional seed sources through a quick Google search:
(
https://www.google.com/search?q=camellia+sinensis+seeds&rlz=1C1AVNE_enUS611US643&oq=Camellia+sinensis+seeds&aqs=chrome.0.0i20i263i512j0i457i512j0i512l5j69i61.6370j0j9&sourceid=chrome&ie=UTF-
including this one:
https://www.caribbeangardenseed.com/products/green-tea-plant-seeds-camellia-sinensis-aka-tea-plant-perennial-shrub
There's a commercial tea grower in Athens, Georgia (USDA zone 8A).
http://www.piedmonttea.com/
and another in Brookhaven, Mississippi (USDA zone 8B):
http://www.greatmsteacompany.com/
They are part of the U.S. League of Tea Growers, working to establish tea as a new, ethically-produced, first-world crop in the southern U.S.:
https://usteagrowers.com/
Piedmont Tea Company has shared YouTube video tutorials on germinating tea seeds. Part One is here:
https://www.youtube.com/watch?v=qgsG6jtp5ZU
The University of Hawaii's Cooperative Extension Service (Manoa, Hawaii, USDA zone 11a) has provided an instructional pdf, "Germinating Tea Seeds," that also includes information about properly caring for young tea seedlings. The link is here:
https://www.ctahr.hawaii.edu/oc/freepubs/pdf/scm-17.pdf
There are so many kinds of Camellias you can grow from seeds and/or cuttings:
* C. sasanqua (a fall-blooming evergreen ornamental)
* C. japonica (a spring-blooming evergreen ornamental)
* C. sinensis (the source of green, black, and ooling tea)
* and even C. oleifera, grown for its oil!
As Rob Meyer pointed out, growing our own is always the cheapest solution. And
as Jeanine Gurley Jacildone noted, USDA zones 7B and south are great for growing Camellia sinensis tea!