I would just throw it out and buy a new, fresh bag. Not worth the chance. I'm no scientist, so I cannot tell you what kind of puke (as you called it) is growing inside that bag.
no worries yes its composted and tested
The pH will range between 5.8 - 7.5.
I haven't used this for roses myself but I don't know any reason why it wouldn't.
I have gotten this pack multiple times but never actually weighed it. Not light. I can pick up and move around (in my 40's, moderately active) but it is awkward shape for taking a distance. Wheelbarrow will be your friend. The upsize is there is alot of great dirt packed in this cube
Not sure.....description on the Home Depot Website might help
for that size bed, you will need 20 cu. ft of soil in each bed. I recommend using 5 bags of Kellogg Garden Organics 3 cu. ft. Raised Bed and Potting Mix Premium Outdoor Container Mix and top it off with 4 bags of steer manure per bed https://www.homedepot.com/p/1-CF-Steer-Manure-Blend-71751185/100619087 I would also add some organic general purpose fertilizer during planting to help your plants grow healthy.
1 cubic foot = 1 square foot that is 1 foot deep (1x1x1) (or 12”x12!”x12”) 16’ x 8’ = 128 cf x 6” deep (1/2 a foot) = 64 cf Divide 64cf by 3cf per bag = 21-22 bags
I was pleased with this product. I liked the texture and the plants seem to do well in it.I am a big fan of compost and adding some extra always a great idea.
I don't know exactly, but it is very heavy. I get a back ache every time I bring one of these home.