GRASS...

[pinkypig]

I wanted to know in terms of cellular activity e.g. epidermal and corticle cells why grass needs to be cut after every few days in the summer.

[MrMistery]

because it grows?

[pinkypig]

ok i don't think i wrote the question properly,

I wanted to know in terms of cellular activity e.g. epidermal and corticle cells why grass needs to be cut after every few days in the summer and less frequantly in the winter?

[Ultrashogun]

It grows alot faster in the summer.

[MichaelXY]

Maybe less sunlight? Perhaps enzyme activity is not optimal at cold temps. Lipids?

[orange04]

Meristematic cells at the shoot region are more active during warm period.
Sunlight provides more energy for cell divisions, enhance photosynthesis and therefore more food to produce new morphological parts.
No wonder tropics region has more plants and evergreen