You can simply use things that are available at your home, such as paper cups, milk cartons, and yogurt cups. With a better budget, you had better buy trays specially designed for seed starting ...
Invest in some communion cups. The seed starting trays do not come with domes ... And no need to scribble on random paper.
You can give your flower and vegetable garden a head start ... if the seeds you saved from last year will germinate or if you ...