Heuchera ‘Obsidian’

Alum Root 'Obsidian'

Heuchera ‘Obsidian’ stands out with glossy, near-black leaves that deepen in colour as they mature, topped with delicate creamy flowers in summer. Compact and semi-evergreen, it forms neat mounds ideal for edging paths or softening patio spaces. With drought resistance, cut-flower value, and the RHS Award of Garden Merit, it offers both elegance and reliability in Irish gardens.

Flowering Months

Jan J

Feb F

Mar M

Apr A

May M

Jun J

Jul J

Aug A

Sep S

Oct O

Nov N

Dec D

Size

Max Height

0.1 m — 0.5 m

Max Spread

0.1 m — 0.5 m

Growth Habit

Grows in tight bunches from base, forming rounded groups.

Planting Position

Sunlight i Indicates how much direct sunlight the plant needs each day. Full sun means 6+ hours, part shade is filtered or morning sun, and full shade is little to no direct sun.

Full Sun Part Shade

Aspect i Aspect refers to the direction the planting spot faces (north, south, east or west). It affects light levels, warmth and exposure.

North South East West

Exposure i Exposure describes how sheltered or exposed a plant’s position is, particularly to wind and weather.

Exposed / Sheltered

Hardiness i Hardiness indicates how well a plant tolerates cold conditions outdoors. Higher ratings generally mean greater frost tolerance.

(−20 to −15 °C) Very cold-hardy

Ideal Soil Conditions

Soil Type i Soil type describes the texture of the soil (clay, sand, loam, chalk). This affects drainage, nutrients and how roots grow.

Loam Sand

Soil Moisture i Soil moisture tells you how wet or dry the soil should be for best growth. Match this to your garden conditions for healthier plants.

Moist but permeable / Free draining

Soil pH i Soil pH measures how acidic or alkaline the soil is. It affects nutrient availability and can impact plant growth.

Neutral

Plant Uses & Merits

Uses

Patios / Courtyards
Containers
Flower Borders
Groundcover
Banks / Slopes
Edging
Underplanting

Merits

Drought Resistant
RHS | Award Of Garden Merit
Good for Cut Flowers

Heuchera ‘Obsidian’ Description

Planting Guide for Heuchera ‘Obsidian’

Standard shipping normally takes 3-5 days. Next day shipping is available on all domestic orders (for an additional charge). International shipping times depend on the products and destination (estimated at checkout).

Care guide for Heuchera ‘Obsidian’

Items must be returned within 30 days after receiving your order. Items must be returned in the same condition in which they were received, be unworn/unused, have any tags still attached, and include all the original packaging.

Uses for Heuchera ‘Obsidian’ & Garden Styles it suits

Refunds are processed within 7 days from when we receive the item(s).

Why Are My Hosta Leaves Turning Yellow or Brown?
Yellowing or browning hosta leaves can mean several different things, from normal autumn die-back to sun scorch, drought, or virus. This guide helps you identify the cause and respond correctly.
Can Hostas Grow in Sun? Which Varieties Tolerate More Light
Hostas are shade-tolerant, not shade-dependent. Discover which varieties handle sun well, what conditions they need, and how Irish gardens are ideal for growing hostas in more light.
How to Grow Hostas in Pots and Containers: The Complete Guide
Hostas are outstanding container plants. Learn how to choose the right pot, compost and position for spectacular results in any Irish garden.
How to Protect Hostas from Slugs and Snails: 10 Methods That Work
10 practical ways to protect hostas from slugs and snails, including better siting, tougher varieties, pots, barriers and early prevention.
How to Grow Hostas in Ireland: The Complete Guide
Hostas are one of the easiest and most rewarding foliage plants for Irish gardens. Here is how to plant, grow and care for them successfully.