Yes, both of these plants can be propagated via seed and stem cutting.  Here are the steps for these methods: Propagating via Seed • Purchase Philodendron or Pothos seeds from a reputable seller  • Soak Pothos seeds for 24 to 48 hours (Philodendron seeds do not need this) • Fill a seed starter tray with seed starting mix • Place the seeds in the seed starting mix and cover them lightly (too much soil will suffocate them) • Moisten the soil lightly with a spray water bottle • Set either the seed starter tray lid or plastic wrap over the top of the tray • Place the tray in a room that is warm and has plenty of bright but indirect sunlight • Remove the lid or the plastic wrap every few days to allow fresh air into the container • Keep the soil moist • Once sprouts have appeared and have grown strong, they can be transferred to a permanent plant container and treated as mature plants Propagating via Stem Cuttings in Water: • Sterilize a cutting utensil • Cut off a healthy stem that includes at least one node and one leaf • Set the stem in a glass of clean water (make sure that the leaves are not covered by water since this will cause them to rot) • Place the glass in a room that is warm and has access to plenty of bright but indirect sunlight • Change the water every week • Once roots appear, transplant the plant to a container filled with soil and treat it as a mature plant Propagating via Stem Cuttings in Soil: • Sterilize a cutting utensil • Fill a well-draining plant container with well-draining soil • Cut off a healthy stem that includes at least one node and one leaf • Set the stem securely in the soil • Place the plant container in a room that is warm and has access to plenty of bright but indirect sunlight • Moisten the soil • Care for the plant as you would a mature plant being careful to not let it get cold or sunburnt or allow its soil to get soggy