Propagating houseplants can be a fun and rewarding way to expand your plant collection or share your plants with friends and family. While different plants may have different requirements for propagation, some houseplants are generally considered to be easy to propagate. Here are some of the easiest houseplants to propagate:

1. Pothos (Epipremnum aureum): Pothos is a popular houseplant that is known for its hardiness and ability to thrive in a variety of conditions. It's also very easy to propagate, as it readily produces aerial roots that can be cut and rooted in water or soil.

2. Spider plant (Chlorophytum comosum): Spider plants are another easy-to-propagate houseplant that are known for their air-purifying qualities. They produce "babies" or plantlets that can be clipped and rooted in water or soil.

3. Snake plant (Sansevieria): Snake plants are a low-maintenance, hardy plant that is known for its air-purifying qualities. They can be propagated by dividing the plant or by taking leaf cuttings and rooting them in water or soil.

4. Chinese evergreen (Aglaonema): Chinese evergreens are another low-maintenance plant that is easy to propagate. They can be propagated by dividing the plant or by taking stem cuttings and rooting them in water or soil.

5. Rubber plant (Ficus elastica): Rubber plants are a popular houseplant with large, glossy leaves. They can be propagated by taking stem cuttings and rooting them in water or soil.

6. Heartleaf philodendron (Philodendron hederaceum): Heartleaf philodendrons are a popular trailing plant that can be propagated by taking stem cuttings and rooting them in water or soil.

These are just a few examples of easy-to-propagate houseplants, but many other plants can be propagated with a little bit of patience and care. With the right technique and environment, you can enjoy watching your new plants grow and thrive.