I consider these labeled sticks (marked on both sides) to be an important step in maintaining the identities of the tobacco varieties I grow. Since the 48-cell inserts for my 1020 trays will divide into 4-packs, I mark one stick for each 4-pack that will hold seedlings. I always place the seedlings of only one variety into each 4-pack. The sticks are marked on both sides, because sunlight on the trays will tend to bleach-away the marking on the side facing the sun.
The large sticks are to mark the variety in the ground, once they have been transplanted. For good measure, I also place the smaller sticks alongside their transplants in the garden bed. Outdoors, I position each large stick so that one of its surfaces faces North, assuring that I will always have a readable marker.
Every growing season—every one—we have at least a few FTT members distressed over mixing up their varieties.
I purchase the sticks in the craft section of Walmart, and mark them with Sharpie markers. Even though it is a tedious thing to mark all the sticks for a large grow (this one is a little grow), that task removes one worry from the long list of other stuff that can go wrong.
Bob