Using Mulch in my Greenhouses

On Facebook I see a lot of photos of people's greenhouse. Here in Hawaii, they are often actually high tunnels as opposed to the greenhouses one finds on the mainland. But regardless of what you call them, folks here use them to grow food. Sometimes plants are grown right in the ground, but more often than not, they are growing in some sort of raised bed or container because of our lava rock ground. What I've noticed is that no one seems to use mulch in their greenhouses. I'm not sure why.

I mulch the soil in my greenhouses, for the same reason I use mulch in my outdoor gardens. 

... Weed suppression

... Soil moisture retention

... Add to the soil fertility 

Due to the sun and heat, the soil inside the greenhouse dries out quickly. It's common for me to water a greenhouse every other day if it is not mulched. By mulching, I can reduce the need to water to about every 5th day. When it's not windy and sunny, the greenhouse can go a full week between waterings. 

I prefer to use fresh grass clippings for mulch, especially for the greenhouses. It's easy to use and easy to control the thickness of the mulch. 

Mulched basil and young tomato plants in a greenhouse.