With these easy to make biodegradable pots there's no need to go out and buy expensive peat pots. These are the perfect size for normal size seedlings. Big seeds like sunflower seeds are not suitable for a starter pot this size but that should be a given. This pot is perfect for starting seeds and can be planted directly into a bigger container or into ground soil. They cost almost nothing and are a great way to re-use something you would have thrown away anyway.