Plant Mutations in the Garden

In medicine, malformations and maladies are cause for concern – rarely are they as innocuous as double eyelashes or violet eyes. However, what becomes a bane in humans is sought-after in the plant world. Mutations like unexpected coloring or unusual formations, perhaps tuberous growths on a peach, are viewed with curiosity or even welcomed. 

Below is a list of striking plant mutations that can appear in your own garden if you’re lucky: peloria, fasciation, chimera, sport variegation, and albinism. 

1. Peloria 

Maximalist gardeners will indulge in the exceedingly rare peloric foxgloves, which seem like a psychedelic trip down the rabbit hole. Peloria is a fascinating mutation where a flower that is usually bilaterally symmetrical suddenly develops radial symmetry, with the petals arranged in a circular fashion. 

While evolutionary botanists view this as a reversion to an ancestral form, gardeners often prize peloric blooms for their bizarre, novelty appeal. Raised beds and plant supports can help cultivate a dense appearance, offering a higher chance of heritable changes found. 

• What it looks like: A foxglove flower that normally exhibits neat clusters opens to a monstrous beautiful flower at the top of the inflorescence, the flower stem. 

• What causes it: Peloria is often triggered by environmental stress, changes in light exposure, or subtle epigenetic shifts that alter gene expression during floral development.

2. Fasciation 

Coneflowers are mostly regarded as plain, unless they’re affected by fasciation. Instead of their staid forms, the growth tissue becomes elongated, leading to fused flower heads, slug-like centers, thick rosettes, and other bizarre formations. 

Fasciation is highly sought after by succulent collectors, with "crested" forms of cacti and succulents commanding high prices due to their architectural, alien-like beauty. In the general garden, a fasciated flower spike makes a striking conversation piece.

• What it looks like: Stems expand wildly in width, creating a heavily crinkled, fan-like structure. Instead of producing a single flower bud at the tip, a fasciated stem often bears dozens of blooms crammed tightly together in a chaotic, magnificent crown.

• What causes it: This mutation occurs when the apical meristem – the plant's growing tip – grows horizontally instead of vertically. It can be caused by bacterial infections, insect damage, frost, or hormonal imbalances.

3. Chimera 

Those with heterochromia eyes that are neatly divided between two different colors – complete Heterochromia iridum – are sometimes described to have chimera eyes. A chimera is a plant composed of tissues with different genetic makeups growing side by side. Rather than a uniform genetic code throughout, the plant is a biological mosaic.

Breeders are fond of them because they can capture two distinct traits in one plant. Specialty greenhouses, used to house delicate plants or extend the growing season, will enhance your appreciation for those oddities. Propagating from seed will result in disappointment, as cuttings, grafting, or division are required to preserve the mutation, though even then, they may revert. 

• What it looks like: Chimeras manifest commonly as variegated foliage or splotches patches, though they can also appear as fruit that is half one color and half another (like a lemon split perfectly down the middle with green and yellow).

• Why it happens: Mutations occur randomly in a single cell within the growing tip. As that cell divides, it creates a distinct layer or sector of mutated tissue alongside normal tissue. 

4. Sport Variegation

Many of the most famous variegated cultivars started as a sport – a sudden, spontaneous mutation on a single branch.

Sports are a goldmine for horticulturists. Many desirable variegated houseplants were once sports that were saved by the prudent gardener. If you find a stable sport in your yard, you can prune it carefully and propagate it to start your own unique cultivar.

• What it looks like: A spontaneous mutation arising from a single branch, featuring brightly striped or splashed leaves.

• What causes it: A localized mutation disrupts chlorophyll production in certain cell layers, leaving patches devoid of green pigment.

5. Albinism 

Many flowers are white in color, but they do not qualify for albinism – the careful eye knows that the paleness that marks a plant with albinism is different from those of normal plants. They often have a chalky appearance and live ephemeral lives. 

Unlike animals, which can sometimes live long lives with albinism, albino plants are fatalistically doomed. The gene mutation that gives rise to this condition proves to be swiftly fatal. In certain circumstances, albino redwoods have eked out a precarious survival by feeding off a host tree's root system, allowing them to survive for years as ghostly garden phantoms.

• What it looks like: Ghostly white seedlings or shoots emerge a ghostly white, entirely devoid of green pigment, only to die within a few days. It is most observable in seed-starting trays, though it can happen in vegetables, ornamentals, and trees. 

• What causes it: A near absence of chlorophyll-producing genes, resulting in a pallid off-white or yellow color.