Hard Seed

Seed with a seed coat that is impervious to water and will not germinate, even though it is viable. Legumes commonly produce seed with a high portion of hard seed. Hard seed will de-harden in the soil over time, due to freezing and thawing, etc. Hard seed can also be scarified (etched or scratched) by mechanical or other means to enable it to take up water more quickly and germinate.


Grasses are heading from the time the head begins to emerge from the boot until it is fully out of the boot. The stem continues to grow and elongate, elevating the head, even after heading is complete.