These look like Bluebell bulbs. Very prolific and can be invasive but I still love ‘em!

I had to get out of bed and show this to my husband who hates raisins in cinnamon rolls. Personally I love them so if I don’t want to share…😜

1. Compost and just use a rake to spread it as evenly as possible to a depth of 1/2-1”
2. I rarely use fertilizer so would skip it but if you do apply it then sprinkle it lightly around the moss and not directly on it and 5-5-5 is a good all purpose imo
3. Depends but if you are planting 2” plugs in summer then daily or every other day and use enough water to soak down past the roots.
4. Can’t help with this as I’ve never tried starting Irish moss from seed. Plants established quickly for me and typically doubled or tripled in one year.