Step 2: Seeds Have Sprouted
This also helps a great deal when you're planing out a garden because you can visualize where plants will grow after you've sown them. You can lay out perfect rows for herbs and vegetables and even geometric patterns in your garden too when you know where the seeds are going to get planted and space things accordingly. You could even write the name of the plant on the tube and it should last long enough for you to identify them later.
I noticed that this also cuts down on the amount of water I use because instead of applying water to where I think I may have planted seeds I can water where I know I planted seeds.This reduces the amount of time I spend watering and how much water gets wasted because it is only applied to the area inside the paper ring.
Finding a use for these cardboard tubes keeps them out of the landfill. Adding them to the dirt provides organic matter for worms and other beneficial insects that break it down and turn it into soil for your garden.
Hope you find this Instructable useful and can apply it in your garden. If you live in the Chicago area I've got a new garden blog at Chicago Garden that I invite you to visit and participate in.