Which grafting methods are commonly used in horticulture?

• A. Whip-and-tongue graft and cleft graft
• B. Bud graft and root graft
• C. Grafting by air layering
• D. Topworking graft and side-veneer

Answer: (A)

Grafting relies on joining tissues so the cambial layers align and grow together. The two methods described are widely used because they work well across many species and sizes, and they create a strong, well-aligned union that heals reliably in nursery and field settings. The whip-and-tongue graft interlocks the scion and rootstock with matching tongues, which helps maintain precise alignment and provides good mechanical stability during healing. The cleft graft splits the rootstock and inserts a suitable scion, offering ample cambial contact on multiple surfaces and is especially handy when the rootstock is larger than the scion. These characteristics make them part of the standard toolbox for propagating or repairing many woody plants.

Air layering, while a common propagation method, is not a grafting technique. Bud grafting is indeed a grafting method, but the pairing shown emphasizes two universal whip-and-tongue and cleft approaches rather than a combination of budding with another method. Topworking and side-veneer are valid grafts as well, but they are more specialized or situational compared with the broad applicability of the two methods above.