To propagate Gray Dogwood, the most common method is taking semi-hardwood cuttings in the summer, removing lower leaves, dipping the cut end in rooting hormone, and planting them in a moist, well-draining potting mix with perlite and peat, ensuring they receive indirect light until roots develop; you can also try propagating from seed, but cuttings generally offer a higher success rate. 

Key points about propagating Gray Dogwood:

Cutting type: Take semi-hardwood cuttings during the summer for best results. 

Cutting preparation: Remove the lower leaves from the stem to create wounding points for root growth. 

Rooting hormone: Dip the cut end of the cutting in rooting hormone to stimulate root development. 

Potting medium: Use a well-draining mix containing perlite and peat moss. 

Light conditions: Place cuttings in a location with indirect light. 

Moisture level: Keep the potting mix consistently moist, but not soggy.