Rubber needs deep, fertile soil with pH 4.5–6.0, 20–30 °C, 2000–5000 mm of well-spread rain, and ideally 300–800 m elevation. Planting season: June–July. Clones listed for South Tamil Nadu: RRII 430, RRII 105, RRII 429; many other clones are also listed.
Pending expert review
Source
Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Rubber – Varieties; soil and climate; season, p. 207
