Grafting platforms for vegetables

Grafting platforms join a high-yield vegetable scion (tomato, watermelon, melon, cucumber) onto a wild rootstock bred for disease resistance and a vigorous root system, solving the soil-pathogen problem left by the phase-out of the methyl bromide soil fumigant without any genetic modification. Rijk Zwaan (Netherlands) breeds tomato rootstocks carrying Tm-1-based resistance to tomato brown rugose fruit virus (ToBRFV), a soil- and contact-transmissible virus that has become one of the industry’s most pressing threats, and in April 2026 showcased high-resistance tomato varieties engineered to hold yield and fruit quality on par with non-resistant lines. Syngenta doubled its market share of ToBRFV-resistant rootstocks in southeastern Spain by June 2026, with several million rootstocks planted across the Almería, Murcia and Costa de Granada growing regions. Smart Sowing Systems (Netherlands) makes the SGM automatic grafting machine, which gained attention in Japan in 2026 after robotics distributor Iwatani selected it for an end customer and a regional trade forum featured it among the leading automatic grafters on the market. In the US, Clemson University’s Edisto Research and Education Center runs the Carolina Strongback grafted-rootstock program, evaluating grafted watermelon nursery plants for fusarium wilt control as part of the broader USDA-coordinated vegetable-grafting research effort.

The key directions of grafting platforms for vegetables are:

1. Disease-resistant rootstock breeding: developing wild rootstock lines resistant to soil-borne pathogens (fusarium, nematodes) and emerging viral threats like ToBRFV, without altering the scion variety’s fruit traits.
2. Robotic precision grafting: machine-vision-guided robotic arms that cut and align the vascular bundles of scion and rootstock seedlings for a clean, high-survival graft union.
3. Healing-chamber conditioning: climate-controlled chambers that hold humidity and temperature at levels that maximize graft-union survival during the critical post-grafting healing period.
4. Biodegradable grafting clips: silicone or biodegradable clips that hold the graft union in place during healing and release naturally as the stem thickens.

Sectoral value chain#

[Disease-resistant rootstock breeding] ──> [Synchronized scion/rootstock seedling growth] ──> [Robotic cutting & clip assembly]
                                                                                                            │
                                                                                              (Machine-vision stem-thickness matching)
                                                                                                            │
        [B2B sale of elite grafted seedlings] <──── [Hardening off in greenhouse] <─── [Healing-chamber conditioning]

Value chain levels#

Cross-cutting technologies of the sector:

• Grafting machine vision: AI algorithms that analyze stem thickness and cut angle in real time, precisely aligning the cambial layers of scion and rootstock stems for a strong graft union.
• Biodegradable grafting clips: specialized clips that hold the graft union in place during healing and release on their own as the stem thickens, without needing manual removal.
• ToBRFV-resistant rootstock breeding: introgressing Tm-1-based and related resistance genes from wild tomato relatives into commercial rootstock lines to block a soil- and contact-transmissible virus that bypasses conventional fungicide-based soil treatments.

The vegetable-grafting stack pairs disease-resistance breeding with robotic precision assembly and controlled-environment healing:

1. Grafting machine vision:
   • AI algorithms analyze stem thickness and cut angle in real time using 3D optical sensors, precisely aligning the cambial (vascular) layers of scion and rootstock stems to maximize graft-union survival rate.
2. Biodegradable grafting clips:
   • Specialized silicone or biodegradable clips hold the graft union in place during the healing period and release on their own as the stem thickens, avoiding the labor cost of manual clip removal.
3. ToBRFV-resistant rootstock genetics:
   • Introgressing Tm-1-based and related resistance genes from wild tomato relatives (Solanum habrochaites) into commercial rootstock lines blocks a highly contagious soil- and contact-transmissible virus that bypasses conventional fungicide-based soil treatments.