Arrowleaf elephant's ear can be propagated ideally during Spring by using tubers. Propagation difficulty is moderate, and successful growth is indicated by new leaves sprouting. Encourage root growth by maintaining moisture and warmth.

Quince propagation typically occurs during Spring and Winter through grafting and layering methods. Though moderately challenging, successful propagation is indicated by new growth and the development of roots. Ensure proper technique and timing for best results.

To propagate hardy iceplant, start with a healthy stem cutting, ensuring it contains a few leaves for successful rooting. Allow the cut end to callous over for a few days before planting to prevent rot. Plant the cutting in well-draining soil, mimicking hardy iceplant's native arid habitats. Keep the soil lightly moist and provide bright, indirect light to encourage root development. Rooting typically occurs within a few weeks, after which you can gradually acclimate hardy iceplant to its permanent location. Regularly check for root establishment and resist overwatering to maintain the plant's overall health and vigor.

Trailing petunias are vibrant and versatile plants, perfect for spilling over containers and brightening up hanging baskets. When propagating, sowing is a practical choice. Use a well-draining, lightweight potting mix to ensure the best start. Lightly press the seeds into the soil but do not bury them, as they need light to germinate effectively. Maintain consistent moisture and keep them in bright, indirect light until germination, which typically occurs within two weeks.

Balsam poplar thrives when propagated through cuttings. To ensure success, select healthy, disease-free branches during the active growth phase. Cuttings should include several nodes and be about 6 to 10 inches long. Plant these in a well-drained, moist soil mix, providing adequate sunlight and warmth. Consistent moisture is crucial, so regular watering practices are essential until root establishment is evident. This method effectively maintains the genetic consistency of balsam poplar.

Black oak can be propagated through hardwood cuttings, air layering, and sowing seeds during autumn and winter. Propagation difficulty varies, but successful propagation can be identified by the emergence of new growth. Key propagation tips include using a rooting hormone and ensuring proper moisture levels.

Plumed cockscomb propagates best by sowing in spring. It's an easy-to-grow plant that typically thrives when the seeds are dispersed evenly. Look for emerging seedlings as a sign of successful propagation. Ensure well-drained soil for optimal growth.

Pampas grass is best propagated through division, ideally in spring or autumn. Propagation may be moderately difficult, but successful growth is indicated by new shoots and roots. Ensure proper moisture and sunlight for optimal results.