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Natural RubberAll seasonsBudded cloneUpdated 28 August 2026

RRII 430

An RRII 400-series clone valued for high yield with a relatively wind-firm, well-branched crown; recommended where wind damage has been a problem for RRII 105.

SeasonAll seasons
Maturity periodPerennial тАФ 6тАУ7 years to first tapping, then tapped for ~25тАУ30 years
Expected yieldHigh, with a wind-firm, well-branched crown
Suitable soilDeep, well-drained laterite / lateritic loam, acidic pH 4.5тАУ6.0

Quick facts

Crop
Natural Rubber
Type
Budded clone
Season
All seasons
Maturity period
Perennial тАФ 6тАУ7 years to first tapping, then tapped for ~25тАУ30 years
Seed rate
Not a seed crop тАФ about 445 budded plants per hectare at 4.9 ├Ч 4.9 m spacing
Expected yield
High, with a wind-firm, well-branched crown
Suitable soil
Deep, well-drained laterite / lateritic loam, acidic pH 4.5тАУ6.0
Release
Released by the Rubber Research Institute of India in the RRII 400 series

About this variety

RRII 430 is an RRII 400-series clone that combines high yield with a sturdier, well-branched, relatively wind-firm crown. It is a useful choice on the more wind-exposed sites of the traditional belt, where RRII 105 has been prone to branch snap and wind throw.

Key characteristics

    Plant typeBudded clone
    MaturityPerennial тАФ 6тАУ7 years to first tapping, then tapped for ~25тАУ30 years
    Yield potentialHigh, with a wind-firm, well-branched crown
    Disease resistanceGood general disease tolerance
    SoilDeep, well-drained laterite / lateritic loam, acidic pH 4.5тАУ6.0
    SeasonAll seasons

Sowing & cultivation

  • Sowing timeField-plant with the first steady monsoon rains, roughly JuneтАУJuly
  • Seed rateNot a seed crop тАФ about 445 budded plants per hectare at 4.9 ├Ч 4.9 m spacing
  • Spacing4.9 ├Ч 4.9 m (about 445 trees/ha)
  • Sowing methodPlant into pre-dug, refilled 75 cm pits on a contour layout, with a leguminous cover crop between the rows
  • IrrigationRainfed in the traditional belt; immature-phase irrigation only in dry non-traditional tracts
  • FertilizerGraduated immature NPK-Mg mixtures in split rounds; a mature-rubber mixture once or twice a year after opening
  • HarvestingOpened at year 6тАУ7 on girth; then alternate-day tapping, refoliation rest and monsoon rain-guarding

Soil & climate

Soil

Suitable soil
Deep, well-drained lateritic soils, including the windier ridge and coastal sites
pH
4.5тАУ6.0

Climate

Climate
A good choice for wind-exposed parts of the traditional belt; its firmer crown reduces branch and wind-throw losses

Yield & maturity

Maturity period

Perennial тАФ 6тАУ7 years to first tapping, then tapped for ~25тАУ30 years

Expected yield

High, with a wind-firm, well-branched crown

Actual yield depends on sowing time, soil, irrigation, weather, seed quality and crop management.

Pest & disease considerations

Major diseases

Management notes

  • Prophylactic abnormal-leaf-fall spray before the monsoon
  • Its wind-firm crown reduces but does not eliminate wind risk тАФ shelter belts still help on the most exposed ridges

Advantages & considerations

Why farmers may choose it

  • Wind-firm, well-branched crown тАФ less branch snap and wind throw than RRII 105
  • High yield
  • Suited to exposed ridge and coastal sites

Things to consider

  • Still needs the pre-monsoon abnormal-leaf-fall spray
  • A traditional-belt clone; not for the cold north-east

Suitable regions

Wind-exposed sites in the traditional belt where RRII 105 has suffered wind damage

  • Kerala
  • Tamil Nadu

Frequently asked questions

When should I choose RRII 430?

On wind-exposed parts of a plantation тАФ ridge tops, coastal edges, gaps in shelter тАФ where RRII 105 or other clones have suffered branch snap and wind throw. RRII 430 has a firmer, better-branched crown while still giving a high yield.

Sourced from: Rubber Board / Rubber Research Institute of India, Rubber Board тАФ clone recommendations. editorial policy.