I have no idea what they are but I'm just excited to see mushrooms growing in my garden over the past couple days. It pleases me to know my soil is happy and healthy.
This is my first garden and I've decided to use clover as ground cover. It'll take a couple years to determine if it does what I hope it will accomplish. So far I'm quite happy with how things are turning out and am learning so much.
I'm currently and impatiently waiting to try the first cherry tomatoes but the first bunch should be ripe within the next week.
You sure can walk through it, it's tall enough my 6' fiance fits standing underneath. We usually only barely kiss freezing a few times in the winter, so I haven't bothered to use it to try to keep things warmer. I weave tomatoes over it in the summer and peas in the winter.
I need to take an updated photo (the arch is fully covered now), but here's a before/after of pruning and weaving this year's tomatoes on it after they went wild when I was on vacation in May: