graft failure on Tomato
Quick answer
If your Tomato has graft failure, the most likely cause is: Tomato grafting failure occurs when union formation is incomplete due to incompatible cambium alignment, leading to poor water/nutrient conductance at the graft interface. Incompatible rootstock-scion combinations show necrotic tissue at the graft union by day 10-14, with stunted growth, leaf chlorosis, and eventual collapse by week 4-6.
Start here:
- 1. 1. Rootstock preparation: Sow Solanum habrochaites seeds 5-7 days before tomato scion to synchronize stem diameter (4-5mm); grow at 24-26°C with 16hr photoperiod for vigorous seedlings
- 2. 2. Scion preparation: Grow tomato scion seedlings at slightly cooler (20-22°C) to slow growth; prepare 1.5-2cm single bevel cut at 30° angle using sharp blade
Why Tomato gets graft failure
Tomato grafting failure occurs when union formation is incomplete due to incompatible cambium alignment, leading to poor water/nutrient conductance at the graft interface. Incompatible rootstock-scion combinations show necrotic tissue at the graft union by day 10-14, with stunted growth, leaf chlorosis, and eventual collapse by week 4-6.
How to reverse graft failure on Tomato
- 1
1. Rootstock preparation: Sow Solanum habrochaites seeds 5-7 days before tomato scion to synchronize stem diameter (4-5mm); grow at 24-26°C with 16hr photoperiod for vigorous seedlings
- 2
2. Scion preparation: Grow tomato scion seedlings at slightly cooler (20-22°C) to slow growth; prepare 1.5-2cm single bevel cut at 30° angle using sharp blade
- 3
3. Grafting technique: Use tube grafting method with 2mm silicone clip to hold union; ensure at least 2-3mm cambial contact on one side minimum
- 4
4. Healing environment: Place in darkness at 25-28°C and 95% RH for 3-4 days (high humidity prevents scion dehydration before union forms); then gradually reduce RH to 80% over 3 days
- 5
5. Gradual acclimation: After 7-10 days post-graft, move to normal conditions over 3 days; transplant when scion leaves show no wilting symptoms at 60% RH ambient
Keep graft failure off this Tomato
Select compatible rootstock-scion combinations (Solanum lycopersicum scion on S. habrochaites or S. sisymbrifolium rootstock for most modern varieties); ensure 2-3mm diameter match at graft interface; perform splice graft with 1.5-2cm long angled cut on both scion and rootstock for maximum cambial contact.