Walnut Rootstocks by Sierra Gold Nurseries

Paradox (Hybrid)
Deep rooting anchorage. Well drained sensitive to calcarious and saline soils. Tolerates moisture better than Black. Tends to be more vigorous than Black, common for heavy soils that tend to be wet. Very susceptible to crown gall.

Northern California Black
Deep rooting anchorage. Well drained sensitive to calcarious and saline soils. Less susceptible to crown gall.

RX1 - Available as both potted and bareroot.
A Texas Black crossed with English selection. It is moderately resistant to Phytophthora with average vigor and is currently being tested for response to nematodes. It has survived well in all field tests. A UC Davis patent has been filed on this selection.

VX211 - Available as both potted and bareroot.
A standard paradox rootstock, a cross of Northern California black and English. It is considered root lesion nematode “tolerant” because, unlike “regular” seedling paradox, it survives and grows very vigorously in soils with high lesion nematode populations. This selection also has moderate resistance to Phytophthora and survives well in field tests. A UC Davis patent has been filed on this selection.

Vlach - Available as both potted and bareroot.
A commercial standard Paradox rootstock, (J.hindsii x J.regia) grown by micro-propagation, which originated from a vigorous Paradox tree in Stanislaus County.