|What do seeds do if they are planted too shallow or too deep?|
|Seeds are amazing little packages. They have the embryo of an undeveloped plant, plus enough food (or energy) for that potential plant to sprout a stem up toward the sunlight, develop a couple of leaves, and begin the process of photosynthesis (converting sunlight to sugars). If a seed isn't planted deep enough, the growing roots can push the new plant right out of the soil. If a seed is planted too deeply it can run out of energy, or stored food, before it emerges into the sunshine to begin the process of photosynthesis.|
Seed packets usually recommend the correct planting depth for the seeds they contain. A good rule of thumb is to plant a seed no deeper than twice its diameter.