With your partner, carefully count out three groups of 50 lettuce seeds. Place one group of 50 seeds into each dish on top of the moist paper. After four days and eight days, count out the number of seeds germinating and express as percent germination. After 2-5 days, move all the seeds into white light . The effect of planting depth on seed germination.
Seed companies recommend different planting depths for seeds.
Lettuce seeds are small and need light to germinate. Pea seeds are quite a bit larger. Lettuce seeds germinate poorly when planted deeply compared to peas. If the hypothesis is true, then pea seeds planted deeply will germinate much better than lettuce seeds planted at the same depth. Moreover, pea seeds may be light-inhibited and germinate poorly when planted shallowly.