Agarden plant that has been passed down within a food family and is generally not commercially grown is called a/an product.

I believe the correct answer is an heirloom plant (vegetable/fruit).

An heirloom plant is garden plant that has been passed down within a food family, grown and maintained usually ethnic minority communities and is generally not commercially grown. Heirloom plants are event illegal to sell in some parts of the world, notably the European Union, if the cultivars were not listed as approved for sale.

i came across this and i found it funny that when you're bored you play hangman on so im going to guess a : )