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Heuchera maxima
island alumroot
Heuchera maxima
Heuchera maxima, commonly known as Island Alum Root, is a perennial plant native to the Channel Islands off the coast of California. It is characterized by its large, rounded leaves and tall spikes of small, creamy white flowers. The plant is drought-tolerant and thrives in well-drained soil and partial shade, making it a versatile addition to various garden settings. Its robust root system helps prevent soil erosion, and it attracts pollinators like bees and hummingbirds.
CategoryDetails
Plant TypePerennial plant
Estimated Plant Lifespan5 years lifespan
Sun Requirements2-4 hours direct sunlight (Partial Shade)
Pollination

Method: animal

Notes: Primarily pollinated by insects such as bees and small flies. Hummingbirds also contribute to pollination.

Watering Requirements

Method: top water

Frequency: when soil is dry to the touch

Notes: Water deeply but infrequently, allowing the soil to dry slightly between waterings. Avoid overwatering, which can lead to root rot.

Humidity Requirements

Level: moderate

Maintenance: Generally does not require special humidity maintenance, but benefits from good air circulation.

Care InstructionsRemove dead or damaged leaves to maintain plant health and appearance. Mulch around the base of the plant to retain moisture and suppress weeds.
Temperature Range

Min: -7°C

Max: 32°C

Aquilegia formosa
western columbine
Aquilegia formosa
Western columbine attracts hummingbirds, enhancing the pollinator presence that also benefits Heuchera maxima. Both plants enjoy similar growing conditions of partial shade and well-drained soil.
Ribes sanguineum
Red-flowering Currant
Ribes sanguineum
Flowering Currant provides early spring blooms and attracts beneficial insects, contributing to a healthier garden ecosystem for Heuchera maxima. Both prefer similar soil and light conditions.
Lysimachia nummularia
creeping Jenny
Lysimachia nummularia

Creeping Jenny can be overly aggressive and quickly spread, potentially smothering Heuchera maxima by competing for space and resources.

Vine Weevils

Vine weevil larvae feed on the roots, causing wilting, stunted growth, and potentially plant death. Adults notch the edges of leaves. Check roots and foliage for signs of infestation.

Slugs and Snails

Slugs and snails can chew holes in the leaves, especially on young plants, causing unsightly damage. Look for slime trails and visible pests on and around the plant.

Steps:

    • Divide the plant in early spring or fall.
    • Carefully dig up the mature plant.
    • Gently separate the root ball into smaller clumps, ensuring each clump has healthy roots and foliage.
    • Replant the divisions in well-draining soil at the same depth as the original plant.
    • Water thoroughly and keep the soil consistently moist until new growth appears.

Neem Oil

Effective for controlling pests like vine weevils and aphids. It disrupts their life cycle and reduces their feeding.

Diatomaceous Earth

Sprinkle around the base of the plant to deter slugs and snails. It creates a barrier that they are reluctant to cross.

Mycorrhizae Inoculant

Enhances root development and nutrient uptake, promoting healthier and more vigorous growth.