[From many - one.]

Wrong on two counts

1. Wishing or preferring will not change grass to the more general vegetation:
The Hebrew word translates as grass.

2. Fungi are not plants or vegetation.

[bvw]

That suggests your Hebrew is zilch.

[metmom]

A year is certainly not an unreasonable amount of time for seeds to survive. Many seeds have a shelf life of much longer than that.