De Nova Agro offers its clients Universal Rootstocks.

All the plants (rootstocks) are obtained by in vitro micro-propagation. They are indentical (clonal) plants free of viruses and diseases.

In vitro propagation of Cherry Rootstocks has a range of advantages such as:

  • Fast production of identical material (all of the plants maintain the same characteristics);
  • Plants produced from tissue cultures tend to develop much better and faster;
  • Plants are free of pathogens.

Currently, we have the following clonal universal rootstocks: Empyrean, Controller and Viking.


Empyrean 1 cv. (Primo/Barrier 1)

Pedigree: Peach x Chinese wild peach (Prunus persica x P. davidiana)

Origin: Venice, Italy

Compatibility: Compatible with PEACH, some Japanese PLUMS and APRICOTS and with almost all ALMONDS.

Vigour: Empyrean is a peach hybrid with extraordinary vigor. The vigor of Empyrean results in quick space-filling and rapid increases in production. In young trees, high almond production has not sacrificed nut size. Empyrean shows promise of being one of the best and highest yielding almond rootstocks available for well-drained soils and, demonstrated excellent performance in various regions of the world.

Chilling requirement: Lower chilling requirement.

Nematode resistance: Resistant to Root knot nematode. Tests are ongoing for Ring nematodes. Not resistant to Lesion nematodes.

Phytophthora sensitivity: Appears similar to Nemaguard, but needs more testing.

Verticillium resistance: Slightly susceptible

High pH tolerance: Tolerant to high lime / high pH soil.

Salt tolerance: Good. Performs better than many Peach-Almond hybrids

Calcareous soil tolerance: Moderate.

Empyrean had significantly higher yields than all other rootstocks for the Nonpareil variety.

Adaptation to soil or climatic conditions: Good choice for replant sites as adaptation to many soil types and soil problems. Tolerant to calcareous and alkaline soils. Tolerant to sodium, chloride, boron. Tolerant to waterlogging. Yields equivalent to top 4 almond rootstocks used in California. Rapid root system growth, well branched and deep root system assists in drought tolerance.


HBOK 27 Rootstock

The ‘HBOK 27’ peach rootstock is an intraspecific hybrid between two peach parents, that has size control ability, moderate root knot nematode resistance, less wood from dormant and summer pruning, and produces fewer root suckers.

When used as a clonally produced rootstock with fresh market peach (‘O’Henry’) scions, ‘HBOK 27’ showed size reduction of compound trees and no evidence of graft incompatibility or other abnormalities. Five-year-old compound trees with ‘HBOK 27’ rootstock had 45 % smaller trunk cross-sectional area (TCA) than with the standard rootstock ‘Nemaguard’. Although crop yield per tree usually was less than on ‘Nemaguard’ rootstock, the compound trees with ‘HBOK 27’ rootstock that were smaller generally showed greater cropping efficiency.

The ability to plant smaller trees at greater density in commercial fields provides an opportunity to recover economically viable yields per unit area. The ‘HBOK 27’ rootstock can be used for dessert peach, canning peach, almond, apricot, and Japanese plum (Prunus salicina Lindl.). Compound plants with ‘HBOK 27’ rootstocks provide an opportunity for growers to develop new management practices that utilize the potential of these rootstocks to lower costs through size reduction, reduced pruning and less need for sucker control.



Origin: A complex hybrid of peach, almond, plum and apricot.

Compatibility: Compatible with all commercial almond varieties

Resistance: Tolerant to Ring nematode and root knot nematode and less susceptible to Phytophthora species.

Soil adaptation: Viking is well adapted to well-drained loam and sandy loam soil. In addition, Viking is tolerant of alkaline soils and heavy wet soils

Vigour: Viking is very vigour, upright growth, good anchorage, deep root system. The ability to develop roots from dormant cuttings, when planted in the field. Rapid rooting and growth of the cuttings in the field, facilitates early spring budding of peaches and almonds.

Problems: The largest problem is its sensitivity to dehydration during handling at the nursery and at planting. This has occasionally resulted in new trees failing to push after planting.

Has scion compatibility with Almonds (Prunus amygdalus) and Peaches (Prunus persica).

The trees budded to Viking Rootstock are approximately 25% larger in size, have a greater number of fruit set in the second and third year of growth, the fruit being larger and more uniform in size at thinning time and at maturity having greater production of large size fruit.


It is recommended to make large volume orders a year ahead. The prices on Universal Rootstocks are negotiable.  Please call us for further details. De Nova Agro Team is always delighted to answer your questions.