What's the oldest kept plant seed to have been germinated and grown?

Question

I read the other day that a packet of 40 year old parsley seeds were grown.

Answer 1

Just read today that an extinct date palm was grown from seeds found in a cave that the Jews hid in away from Roman soldiers - dated back to 73 a.d.

Answer 2

A 2,000-year-old seed recovered from the ancient Jewish fortress of Masada near the Dead Sea has become the oldest seed in the world to have germinated successfully, scientists said yesterday.

Answer 3

Date palm seed. Masada, Israel.

see Oldest_viable_seed in wikipedia