The ingredient Ginkgo Leaf is only found as already harvested samples. Although one of the trees found in Cyrodiil is a ginkgo tree, the tree cannot be harvested and the only way to identify the tree as a ginkgo tree is to look in the construction set.
7 guaranteed samples can be found in the following locations:
- 3 samples are in Hanz gro-Hubrag's house in Blankenmarch
- 2 samples are in the Skingrad Mages Guild
- 1 sample is in Brotch Calus' House in Bruma
- 1 sample is in M'dirr's House in Border Watch
It can also be found randomly in the inventories of alchemy vendors and in some loot chests.