Oakleaf hydrangea propagates best through 'cutting' in spring or summer. Difficulty is moderate, with successful propagation indicated by root formation and new growth. Keep the cuttings moist and well-draining to increase success rate.

Common jasmine can be effectively propagated using cuttings, which should be taken from healthy and disease-free parent plants. Choose semi-ripe wood and ensure cuttings are of adequate length, usually around 4-6 inches, containing several leaf nodes. Prepare the cuttings by making a clean cut below a node, and remove the lower leaves to reduce moisture loss. For best results, dip the cut end in rooting hormone powder before planting in a well-draining potting mix. Keep the soil moist and provide indirect light until roots develop.

Reed canary grass propagates primarily through division in spring or autumn for best results. Propagation tends to be relatively simple, with success evident by new shoots and healthy root systems. Maintain appropriate soil moisture to ensure healthy growth.

Obedient plant propagates effectively through division in Spring and Autumn. Moderate difficulty may be encountered in propagation. Successful propagation is indicated by new plant growth. Keep divisions moist while they establish.

Plains coreopsis is best propagated through sowing seeds in Spring. This plant is relatively easy to propagate, with successful germination indicated by emerging seedlings. Thin out seedlings to prevent overcrowding and ensure healthy growth.

The bitternut hickory can be propagated via hardwood cuttings, layering (air), and sowing seeds during autumn and winter. This plant's propagation method is moderate, and successful propagation signals include root development and new shoot growth. Ensure the cuttings and seeds are from a healthy mature tree, and provide sufficient moisture and nutrients during propagation.

"white willow propagates well using hardwood cuttings, layering (air), and sowing seeds in autumn and winter. Its propagation difficulty is moderate. Successful propagation is indicated through root development. Keep the cuttings well-watered, and ensure dipping them in rooting hormone before planting for better rooting."

Persian buttercup is typically propagated through tubers in Spring. While not particularly difficult, success is indicated by sprouted shoots and new growth. It is essential to plant tubers at the right depth for optimal results.