Hoya Wilbur Graves ‘Russia’: Care and Propagation Tips

Among Hoya collectors, the name Wilbur Graves signifies a plant known for its leaves decorated with a stunning silver splash. Within this group, the Hoya Wilbur Graves ‘Russia’ has emerged as a distinct clone. This specific variety captures the attention of enthusiasts for its unique visual appeal and intriguing backstory, setting it apart from its relatives.

Defining the Hoya Wilbur Graves ‘Russia’

The primary identifier of the Hoya Wilbur Graves ‘Russia’ is the quality and density of its silver variegation. This clone is recognized for producing leaves with a consistently heavy and pronounced silver flecking that can cover a significant portion of the leaf surface. The ‘Russia’ variant is sought for the perceived stability and intensity of this trait. The silver markings appear almost painted on, creating a striking contrast against the deep green of the leaf.

The physical shape of the leaves can be a point of confusion among growers. Some sources describe the ‘Russia’ clone as having rounder, more compact leaves, while others report them as being more elongated. This variability suggests that growing conditions play a substantial role in determining leaf morphology, making leaf shape an unreliable sole identifier.

The history of the ‘Russia’ clone is connected to its circulation among collectors rather than a formal origin. It is a cultivar of Hoya carnosa, selected for its splash. The ‘Russia’ designation is believed to have originated because some of the first specimens were imported into the United States and other markets from sellers in Russia. This clone was one of the first Wilbur Graves varieties to gain popularity in the American market.

Ideal Growing Conditions

To encourage the vibrant silver splash, providing the right amount of light is a primary consideration. This plant thrives in bright, indirect sunlight, and an east-facing window is an excellent location. While the plant can tolerate lower light levels, its growth may slow, and the silver markings may not develop as prominently. Direct afternoon sun should be avoided, as it can scorch the leaves.

A chunky, airy, and well-draining soil mix is necessary to prevent water from stagnating around the roots. A successful mix includes components like orchid bark, perlite, and coco coir, which create air pockets and allow excess water to escape. This type of substrate mimics a Hoya’s natural habitat and is the best defense against root rot.

Watering practices should follow a “drench and dry” approach. Water the plant thoroughly, but only when the top inch or two of the soil has completely dried out. It is better to err on the side of underwatering than overwatering. During the dormant fall and winter months, watering frequency should be reduced. The plant also appreciates moderate to high humidity, ideally above 50%.

During the active growing seasons of spring and summer, a consistent feeding schedule supports growth. A balanced liquid fertilizer diluted to half-strength can be applied every four to six weeks. It is important to suspend fertilization during the fall and winter when the plant’s growth naturally slows.

Propagation and Maintaining Traits

Propagating Hoya Wilbur Graves ‘Russia’ is done using stem cuttings, which ensures the resulting plants are genetically identical to the parent. The process involves taking a cutting that has at least one or two nodes, the points on the stem where leaves and roots emerge. This cutting can then be placed in water, sphagnum moss, or a propagation mix until roots develop. The most successful propagation occurs during the spring and summer.

The selection of the cutting material is the most important factor in preserving the heavy splash. The genetic makeup of the node you propagate from directly influences the new growth. To increase the chances of a new plant with heavy silver markings, choose a cutting from a vine that already exhibits stable and extensive splash. Propagating from a less variegated part will likely result in offspring that lack the desired trait.

Even with careful selection, genetic stability can vary. Light and care can support the health of the plant, but they cannot create variegation that is not already in the plant’s genetics. Occasionally, a new vine may produce leaves with less splash than the mother plant, a phenomenon known as reversion. This underscores the importance of starting with the best possible genetic material.

Common Challenges and Solutions

One of the primary concerns for owners is the potential loss of its variegation. If you notice a new vine consistently producing leaves with little to no silver splash, this is a sign of reversion. The plant is defaulting to its less variegated Hoya carnosa genetics. The solution is to prune the reverting vine back to the last node that displayed a strong splash pattern, which encourages the plant to activate a new growth point.

Growers might observe stunted growth, woody stems, or tan-colored scabbing on the leaves and stems. These symptoms, often paired with the loss of new leaves, can indicate an infestation by pests like flat mites. These pests are small and difficult to see, but their damage is distinct. Addressing this requires treating the plant with an appropriate miticide, such as horticultural sulfur mixed with water.

Compared to other Hoyas, the Wilbur Graves ‘Russia’ can be a slower grower. This is a natural characteristic of a highly variegated plant, as the silver parts of the leaves lack chlorophyll and cannot photosynthesize. Providing consistent and optimal growing conditions, particularly with light and humidity, is the best way to support its growth rate. Avoid frequent changes in its environment, which can cause stress.