Rootstock PG 2

Technical Profile of the PG 2 Rootstock

The PG 2 rootstock, developed by the I.V. Michurin Federal Scientific Center, is classified as a vigorous rootstock. Its physiological profile is specifically engineered to support robust tree architecture and extensive root development, distinct from modern dwarfing alternatives.

Core Technical Parameters

• Vigor: The vigorous nature of this rootstock promotes strong vegetative growth, facilitating the development of large, high-yielding trees capable of optimal nutrient uptake over a long lifespan.
• Graft Compatibility: The genetic configuration of PG 2 is optimized for a seamless union with commercial pear varieties, reducing mechanical stress and failure rates at the graft point.
• Fruiting Cycle: Trees grafted onto PG 2 typically begin commercial production in the 4th–5th year. This timeline is a consequence of the rootstock's growth strategy, which prioritizes structural framework development during the early years.
• Climate Limitations: The cold hardiness of PG 2 is rated up to -15°C. This threshold is critical for strategic planning: the rootstock is strictly suitable for southern regions or areas with mild winter climates where soil freezing at root depth is unlikely to occur.

The application of PG 2 is best suited for orchards where long-term tree durability and large canopy volume are the primary objectives. Given the restricted frost resistance, the use of this material requires careful site selection to avoid temperature extremes that could impact the tree's health through root damage.