OK..... Update time.....
I planted two seeds in Tea Bags & 2 seeds in toilet rolls filled with lose leaves from the tea bags.
The two teabag plantings at this time have not sprouted, I think the depth is insufficient for them.
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Out of the two toilet rolls filled with lose leaves from the tea bags, 1 has sprouted, 1 has yet to pop.
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The one that germinated looks OK, but will need to be grown out to examine it more.
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So it could be the other seed was a dud, or something else.... either way it has proved it is possible to use "Used Tea Leaves" as a germinating medium, but more research needs to be done.
The trouble is... I need 2 seeds for my tent, so I am going to wet 1 more seed (following my normal germination method of shot glass & water) and try and grow the two out together side by side.