C-35 Rootstock

1. Never Bend the Taproot ("J-Root" Prevention)

Rootstock vigour depends on a straight vertical taproot. Always use deep polybags or deep pots (at least 12–14 inches deep) and ensure the main root points straight down when potting.

2. Sterile, Disease-Free Nursery Media

Use solarized/clean mix: 40% sand + 40% loamy soil + 20% vermicompost enriched with Trichoderma viride (5 g/pot).

3. Single-Leader Desuckering

Strip all side shoots along the bottom 25–30 cm of the stem while they are soft so the plant grows as a single, smooth, straight whip.

4. Stake Vertically

Tie the stem to a straight bamboo split so the budding zone (15–25 cm height) remains perfectly straight.

1. High-Vigour Vegetative Nutrition

Feed every 21 days with balanced 19:19:19 (2 g/L foliar or soil drench) + humic acid to push rapid stem caliper growth to 6–8 mm (pencil thickness).

2. Pre-Budding Irrigation ("Bark Slipping")

Water thoroughly for 5 days before grafting/budding so the vascular cambium is actively dividing and the bark peels ("slips") cleanly without tearing.

3. Rootstock Selection by Soil Type

Use Rangpur Lime for drought/saline/heavy soils; Carrizo/C-35 Citrange for high fruit quality in loamy soils; Swingle Citrumelo for Phytophthora and nematode resistance; X-639 for calcareous soils.

4. Keep Foliage 100% Canker & Miner Free

Protect leaves with regular Neem Oil (5 ml/L) sprays so photosynthetic capacity stays high during graft healing.

1. High Budding at 15–20 cm Above Collar

Perform shield T-budding, chip budding, or cleft grafting at 15–20 cm height using surface-sterilized (1% sodium hypochlorite) grafting knives and certified scion budwood.

2. 21-Day Paraffin/Polythene Tape Wrap

Wrap the bud union tightly with 100-gauge grafting tape (leaving the bud eye exposed in warm weather or covered in dry weather). Unwrap after 18–21 days if the bud petiole drops cleanly at a touch and the shield remains green.

3. Lopping / Heading Back to Force Scion Push

Once the bud union heals (day 21), cut the rootstock stem halfway through 5 cm above the bud and bend it over ("lopping") to break apical dominance; make the final clean 45° cut 1 cm above the scion shoot once it reaches 10 cm.

4. Strict Nucellar & Virus Indexing Hygiene

Remove all rootstock sprouts below the union every 5 days during scion elongation and sterilize secateurs between plants.