I found two bales of straw that have been sitting outside all fall and winter. They've gotten wet from the rain and some grass is even growing through them. I'm wondering if it's okay to use these bales as ground cover in my garden, or if the moisture might cause mold that could be harmful.
6 Answers
Mold is actually just nature doing its job to break down organic material. You can definitely use those bales, but wearing a mask is a good idea to avoid breathing in any mold spores. Eventually, the straw will decompose in your garden, which is great for soil health!
Straw is my go-to choice for mulch. It works wonders!
Have you thought about strawbale gardening? It’s a method I use to grow tomatoes, eggplants, and other warm-weather crops. Check out Joel Karsten's method—he’s known for it, especially in northern climates. Using new bales each spring keeps diseases at bay, and at the end of the season, I just toss the old bales in the compost!
In general, common mold isn't a problem for gardens, but be cautious of specific fungi. It’s best to let the bales dry out after breaking them apart before you apply them as mulch.
It should be fine to use as long as you break up any large clumps and don’t apply it too thickly. Just make sure to spread it out well!
I recommend composting the straw first to get rid of any grass seeds before using it in your garden beds. You can even compost it right in place.
Thank you!
Thank you!