How to Graft Figs ｜ Rootstock Selection and Success Tips

Grafting is useful when cuttings from a preferred variety are difficult to root, or when an established tree needs variety conversion while preserving the existing framework. Grafting requires more skill than cutting propagation, but it offers advantages: the sturdy rootstock's root system is retained as-is, so growth is rapid once the graft takes, and the resulting plant can be made resistant to soil-borne diseases such as fig canker. This article covers the purposes of grafting, proper timing, rootstock selection, representative grafting methods, and post-graft care and management.

Main Purposes of Grafting

• When propagating varieties that are difficult to root or when certain propagation of valuable cuttings is desired
• When renewing to a new variety while preserving the roots of an old or declining plant
• When seeking to enhance cultivation stability by using rootstock resistant to soil-borne diseases such as crown rot.

Grafting Timing

The basic timing is February to March, just before buds break dormancy. Completing the work while sap flow is still gentle promotes successful union before the graft site dries. Avoid the severe cold of deep winter; in warm regions, graft somewhat earlier, and in cold regions, aim for March onward.

Selecting Rootstocks

For rootstocks, use varieties with strong root systems and vigor. Masui Dauphine, widely established in Japan, is known for its strong growth habit and suitability as a rootstock. When disease resistance in soil is a priority, Black Ischia types, which are considered relatively resistant, may be used as rootstock candidates. Select rootstocks from healthy plants without lesions, and bring the diameter of the rootstock and scion as close as possible to increase the take rate.

Common Grafting Methods

Cleft Grafting

Cut the rootstock horizontally near ground level and pare away one side at an angle to expose the cambium layer. Prepare the scion at the same angle, then align the cambium layers (the green layer immediately beneath the bark) of both pieces precisely—this is the critical point. Secure the graft union firmly with grafting tape, wrapping it to cover the entire cut surface and prevent drying.

Whip grafting

A method in which rootstock and scion are grown side by side in pots or similar containers and kept in place while thin layers of bark are shaved from both and pressed together for contact. Since work proceeds while roots remain attached, this method has a high success rate for union and is considered beginner-friendly. After confirming successful union, the upper portion of the rootstock and the lower portion (old roots) of the scion are severed.

Grafting Aftercare

• Keep the graft union from drying out by nursing the plant in bright, dappled shade that avoids direct sun.
• Protect the cut surface with grafting tape or wound dressing to shield it from rainwater and drying.
• When buds begin to break after approximately 3–4 weeks, this indicates successful establishment. However, do not remove the securing material prematurely.
• Shoots arising from the rootstock (rootstock shoots) hinder the growth of the scion and should be removed as soon as they are detected.
• Even after the graft takes, keep the plant supported with a stake for a period of time to prevent the union from moving in strong wind.

Points Where Failure Often Occurs

• Cambium layers misaligned → Match the thickness of both parts as closely as possible and fit the cut surfaces together precisely.
• Graft union drying → Seal securely with tape and wound dressing
• Do not use branches lacking vigor on either rootstock or scion → select healthy branches that extended the previous year.
• Performing work after the sap has moved excessively due to missing the proper timing → Follow the recommended early timing of February to March.

When the variety of scion to use is unknown, or when uncertain which rootstock to select, consult the variety guide to review vigor and background, or post details about growing conditions on the forum to obtain guidance.

Fig grafting can be successfully undertaken in home cultivation provided the fundamentals are observed: timing the operation to the appropriate season, aligning the cambium layers precisely, and protecting the graft union from drying. Grafting proves particularly useful for cultivars that are difficult to propagate by cuttings and for rejuvenating aging trees through variety conversion.