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Alumroot, remarkable leaves and elegant blooms

Heuchera - alumroot
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Leaves in caramel, purple, chocolate or citronella hold their colour until the first frosts, while slender spikes of tender pink to deep red flowers rise above them from late spring to midsummer. Alumroot (Heuchera) earns its place in beds, along edges and in pot arrangements; give it cool, well-drained soil in light shade and it asks for almost nothing else.

Alumroot at a glance
Name Heuchera
Family Saxifragaceae
Type flower, perennial
Height 24 to 32 inches (60 to 80 cm)
Exposure full sun or part sun
Soil ordinary
Flowering late spring to midsummer

Caring for this plant, from planting to pruning at the end of winter, should ensure proper development.

Planting alumroot

It’s all the same whether alumroot is planted in spring or fall.

Heuchera planting
Cool, well-drained soil in light shade suits it best
  • Select a spot that is preferably partly shaded over, especially during the hottest hours.
  • It blooms more when it gets direct sun at some point during the day.
  • The soil must be quite cool and well drained.
  • Alumroot loves rather rich soil, so in the best of worlds it should be fertilized before planting.

Propagate through rhizome division in spring or in fall, ideally every 3 years.

Alumroot in containers and pots

The Heuchera is the perfect plant to garnish your pot arrangements, containers and garden boxes. Since it is available in all hues ranging from pink to red, it truly embellishes arrangements with other flowers and keeps its beautiful foliage up to the first frost spells.

  • Verify that the bottom of your pots have holes in them.
  • Eventually, place a bit of gravel or clay pebbles at the bottom to increase drainage.
  • Set each alumroot plant 12 inches (30 cm) from the next to give them space to grow.

The alumroot year at a glance

Alumroot asks for very little, but the few jobs it does need each fall at a set point in the year. Here is the whole cycle, from planting to the end-of-winter cut.

The alumroot year at a glance
Task When Why and how
Planting Spring or autumn Either season suits equally well; choose a partly shaded spot with cool, well-drained, rather rich soil
Dividing the rhizomes Spring or autumn, every 3 years Propagation is by rhizome division, best repeated every third year
Deadheading Through flowering, late spring to midsummer Take off wilted flowers regularly
Cutting back the clump Late winter Encourages a flush of new leaves
Watering First year after planting; all summer in pots Settled plants cope well with drought, but potted ones dry out fast

Once the plant is properly settled in, the list shortens to deadheading and the late-winter cut.

Pruning and caring for alumroot

Remove wilted flowers regularly (deadheading).

Cut back the clump at the end of winter in order to promote sprouting of new leaves.

Watering is recommended during the year of planting, but alumroot copes quite well with drought once it is properly settled in.

If in pots, a good counsel is to water regularly in summer to avoid having the plant desiccate.

All there is to know about alumroot

A very fashionable plant in the days of our grand-parents who used it to decorate their gardens, alumroot is now making a comeback thanks the appearance of new varieties boasting very ornamental leafage, aside from the ease of its care.

Alumroot varieties
Flowers range from tender pink to deep red

The blooming ranges from tender pink to deep red (Heuchera mircantha), this depends on the variety.

The growing is quite easy and doesn’t require any special care.

The many different varieties of Heuchera all boast equally amazing leafage: ‘Caramel’, purple, chocolate, citronella or tiramisu.

  • It is used in flower beds, along edges, on rocky ground and in pot arrangements.
  • A lightly shaded pathway is ideal to set up an edge of alumroot.

Smart tip about alumroot

Its hardiness makes it insensitive to disease, and it thus never requires any treatment.


Images: CC BY 2.0: Andrey Zharkikh, CC BY-SA 2.0: Leonora Enking; Public Domain: Valleybrook Gardens

Written by Gaspard Lorthiois | Loves helping out, especially when it comes to growing things. Worked in herbal medicine, runs a farm, and dabbles in tech. Master's degree and engineer.