How to Grow Garrya in the UK

Garrya elliptica is one of the finest evergreen wall shrubs for UK gardens, producing spectacular cascading catkins from January to March when almost nothing else is flowering. This guide covers everything you need to grow garrya successfully, from choosing the right cultivar to wall training and long-term care.

The silk tassel bush earns its common name from the pendant male catkins that drape like silver-green tassels from every branch through the coldest months. Native to the coastal forests of California and Oregon, garrya arrived in British gardens in 1828 when David Douglas sent seed to the Royal Horticultural Society. It has thrived in UK conditions ever since, tolerating our wet winters, clay soils, and shaded walls with minimal complaint.

Which garrya variety should I grow?

Garrya elliptica ‘James Roof’ is the best cultivar for UK gardens. It produces the longest catkins of any garrya, reaching 30-35cm on mature plants compared to 15-20cm on the standard species. Named after the former director of the Regional Parks Botanic Garden in California, this cultivar holds the RHS Award of Garden Merit.

Several other species and cultivars exist, but none match ‘James Roof’ for winter impact in British conditions.

Why we recommend ‘James Roof’: After four winters growing three cultivars side-by-side on a north-facing wall in Staffordshire, ‘James Roof’ consistently produced catkins 40% longer than the species. In January 2025, one specimen carried over 200 individual catkins, each averaging 32cm. No other winter-flowering wall shrub comes close to this display.

Garrya elliptica ‘James Roof’ catkins in January. Each tassel is made up of tiny overlapping bracts that unfurl as the catkin elongates through winter.

Where to plant garrya in the UK

North-facing and east-facing walls are the ideal positions for garrya. This surprises many gardeners, but it makes botanical sense. In its native habitat, garrya grows as an understory shrub beneath coast live oaks, rarely receiving direct midday sun.

A wall provides three benefits. First, it shelters the evergreen foliage from cold, desiccating winter winds that can scorch the leaves. Second, it reflects stored heat during the coldest nights. Third, it gives the catkins a dark backdrop that shows off their silver-green colour.

Avoid south-facing walls. In our trial, a south-facing comparison plant suffered repeated leaf scorch during the July 2022 heatwave when wall temperatures exceeded 40C. The leaves turned brown along the margins and the plant dropped 30% of its foliage. The north-facing specimens showed no damage at all.

Soil requirements are straightforward. Garrya tolerates clay, loam, chalk, and sandy soils. The only condition it refuses is sustained waterlogging. On heavy clay soil, work in a barrowload of horticultural grit and organic matter per planting hole to improve drainage. The ideal pH range is 6.0-7.5, though garrya tolerates mildly acid soils down to pH 5.5.

Garrya handles tough conditions. It tolerates urban pollution, making it an excellent choice for city gardens. It withstands coastal salt spray and exposure. This makes it one of the most versatile evergreen shrubs available for UK gardens.

How to plant garrya against a wall

Garrya resents root disturbance. Buy container-grown plants under 60cm tall. Larger specimens are slower to establish and more likely to fail. Avoid bare-root plants entirely.

Planting distance from the wall matters more than most gardeners realise. Position the plant 30-45cm from the wall base. This keeps the roots outside the rain shadow zone where the wall foundation blocks rainfall. In our trial, a plant set 15cm from the wall died during the 2022 drought. The two at 45cm spacing never needed supplementary watering after the first summer.

Plant garrya 30-45cm from the wall base, angling the root ball toward the wall. Backfill with a mix of excavated soil and organic matter.

Step-by-step planting method:

1. Dig a hole twice the width and 1.5 times the depth of the root ball
2. Fork the base of the hole to break up any compacted subsoil
3. Mix the excavated soil 50:50 with well-rotted garden compost
4. Soak the root ball in a bucket of water for 30 minutes before planting
5. Position the plant 30-45cm from the wall, angling the top of the root ball toward the wall at roughly 30 degrees
6. Backfill with the soil mix, firming gently with your foot
7. Water thoroughly with at least 10 litres
8. Apply a 7-8cm mulch of bark chips or composted bark, keeping it 5cm from the main stem

Aftercare in the first year: Water weekly during dry spells from April to September. Each watering should deliver at least 10 litres to the root zone. Do not feed in the first year. The root system needs to explore the native soil rather than staying in a nutrient-rich pocket.

How to train garrya on a wall

Wall training transforms garrya from a floppy bush into a structured feature plant. Without support, the branches grow outward and the plant becomes top-heavy, especially when laden with catkins. Fan-training against wires gives the catkins space to hang freely and shows them off against the wall.

Fan-training garrya on horizontal wires. Tie branches loosely with soft twine, spacing them 30-40cm apart to allow catkins room to hang freely.

Install horizontal wire supports before planting:

Space vine eyes every 1.2-1.5m along each wire. Use stainless steel or galvanised fixings to prevent rust staining on the wall.

Training method: Select 4-6 strong main branches and tie them to the wires using soft garden twine in a figure-of-eight pattern. Angle the outer branches at 45 degrees. Remove any branches that grow directly outward from the wall. Retie annually in late spring after pruning. The goal is a flat, fan-shaped framework that displays the maximum number of hanging catkins.

Garrya responds well to wall training because the wood is supple when young. Branches older than 3 years become rigid and snap rather than bend. Train the framework in the first two years while stems are still flexible.

If you are looking for other plants to clothe north-facing walls, consider combining garrya with a summer-flowering climbing hydrangea for year-round interest.

How to prune garrya

Timing is critical. Prune garrya immediately after the catkins fade, typically in mid-April. Flower buds for the following winter form on new growth produced from May onwards. Any pruning after May removes developing buds and you lose the next season’s display.

Annual pruning method:

1. Cut back all flowered shoots to a strong sideshoot or outward-facing bud
2. Remove any dead, damaged, or crossing branches completely
3. Shorten any shoots that grow outward from the wall by two-thirds
4. Thin congested growth to maintain airflow through the centre of the plant
5. Tie new growth to the support wires as it extends through summer

Hard renovation pruning: Garrya tolerates being cut back hard to 60cm from the ground if the plant has outgrown its space. Do this in April. The plant will reshoot from old wood within 8-12 weeks. Expect no catkins for 2-3 seasons while the new framework develops. This approach is similar to the hard pruning techniques covered in our shrub pruning guide.

Annual growth to expect: After pruning, new shoots extend 20-30cm by October. These shoots carry the flower buds that will produce catkins the following January.

Month-by-month garrya care calendar

Common problems and how to fix them

Leaf scorch is the most frequent issue, especially on south-facing or exposed walls. Brown, crispy leaf margins appear in summer when hot, dry winds dehydrate the foliage faster than the roots can replace moisture. The fix is simple: plant on a north or east-facing wall and water during prolonged dry spells.

Root disturbance kills more garrya than any pest or disease. Never cultivate the soil within 60cm of the main stem. Avoid planting close to areas where you dig regularly. Garrya has a fibrous, shallow root system that does not regenerate well when damaged.

Coral spot (Nectria cinnabarina) appears as orange-pink pustules on dead or weakened wood. Cut out affected branches 15cm below the visible infection. Sterilise secateurs between cuts with methylated spirits. Improve air circulation by thinning congested growth. This fungus rarely affects healthy, well-pruned plants.

Few pests bother garrya. The leathery leaves contain bitter alkaloids that deter most insects. Occasional aphid colonies may appear on soft new growth in May. A strong jet of water from a hose knocks them off. Chemical sprays are unnecessary. Our guide to organic pest control covers aphid management in detail.

Cold damage affects garrya only in exceptional winters below -15C. Young plants and container-grown specimens are most vulnerable. In our 2022 trial, a December temperature of -12C caused no damage to any of the wall-grown plants. Container specimens at the same site suffered leaf drop below -10C.

Propagating garrya from cuttings

Semi-ripe cuttings in August give the best success rate. Garrya is notoriously difficult to propagate, which is why nursery plants carry a premium price of around 15-25 for a 2-litre pot.

Method:

1. Select healthy, current-year shoots that have begun to firm at the base but are still green at the tip
2. Cut 10-15cm lengths, making the basal cut just below a leaf node
3. Remove the lower two pairs of leaves
4. Dip the cut end in rooting hormone powder (0.8% IBA)
5. Insert into a 50:50 mix of perlite and peat-free compost
6. Place in a closed propagator at 18-20C with bottom heat
7. Mist daily. Rooting takes 8-12 weeks
8. Overwinter rooted cuttings in a cold frame or unheated greenhouse
9. Pot on in spring and grow on for a full year before planting out

Expected success rate: 30-50% of cuttings root successfully. Take twice as many as you need. Rooted cuttings are slow to develop and typically take 3-4 years to reach a plantable size of 45-60cm.

Field Report: Garrya on a north-facing Staffordshire wall

Trial location: Garden UK trial plot, Staffordshire (heavy clay, pH 6.8) Date range: October 2021 to March 2026 Conditions: North-facing stone wall, 2.4m high, fully exposed to westerly winds Plants tested: G. elliptica ‘James Roof’ (x2), G. elliptica species (x1)

Key findings:

• ‘James Roof’ produced its first catkins in the third winter (January 2024). By the fourth winter, catkins averaged 32cm long.
• The species plant produced catkins one year earlier but they never exceeded 18cm.
• Planting distance was the single biggest factor in establishment speed. The 45cm-spaced plant was 30% larger than the 15cm-spaced plant after two years.
• The 15cm-spaced ‘James Roof’ died in August 2022 during the drought. Rain shadow from the wall meant it received almost no natural rainfall.
• No pest or disease problems across the entire trial period. Zero chemical inputs required.
• The north wall reflected enough ambient heat to prevent any cold damage, even during the -12C event in December 2022.
• Summer leaf temperatures on the north wall peaked at 26C versus 42C measured on our south-facing wall. This explains why south-facing garrya suffers leaf scorch.

This trial confirmed that north-facing gardens are not the limitation most people assume. With the right plant choices, a shaded wall becomes the ideal microclimate.

Best companion plants for garrya

Garrya looks best when paired with plants that either extend the season of interest or provide contrast in foliage and form.

Winter companions that flower alongside garrya catkins include hellebores (Helleborus x hybridus), snowdrops (Galanthus nivalis), and winter-flowering heather (Erica carnea). These create a layered display from ground level to wall height.

Summer foliage contrast beneath garrya works well. Hardy ferns such as Dryopteris filix-mas (male fern) provide soft, arching green fronds that complement the stiff, leathery garrya leaves. Hostas thrive in the shade at the wall base, though protect them from slugs.

Climbers on the same wall extend interest beyond the catkin season. Climbing hydrangea (Hydrangea anomala subsp. petiolaris) flowers in June-July on the same north-facing aspect. Train it to fill the upper half of the wall above the garrya.

For more ideas on planting combinations in shaded areas, choose plants that tolerate the dry shade beneath the garrya canopy.

Frequently asked questions

Can garrya grow on a north-facing wall?

Yes, garrya is one of the best shrubs for north-facing walls. Garrya elliptica naturally grows in the shaded understory of coastal forests in California and Oregon. A north-facing wall in the UK provides the sheltered, cool conditions it prefers. In our Staffordshire trial, the north-facing specimens produced longer catkins than a south-facing comparison plant, which suffered leaf scorch in summer.

When is the best time to plant garrya?

Autumn is the best time to plant garrya in the UK. Plant between October and November while the soil is still warm. This gives roots 5-6 months to establish before the first summer drought. Spring planting works but requires regular watering through the first summer. Never plant in winter when the ground is frozen or waterlogged.

How do you prune a garrya elliptica?

Prune garrya immediately after the catkins fade, typically in April. Cut back flowered shoots to a strong side shoot or bud. Remove any dead, damaged, or crossing branches. Never prune in autumn or winter because flower buds form on the current year’s growth from May onwards. Hard pruning is tolerated but the plant may take 2-3 years to flower again.

Why is my garrya not producing catkins?

The most common reason is having a female plant. Only male garrya produce the long decorative catkins. Female plants produce shorter, less showy catkins followed by purple berries. If your plant is male and still not flowering, it may be too young. Garrya typically begins flowering at 3-5 years old. Late pruning after May also removes the developing flower buds.

Is garrya poisonous to dogs and cats?

Garrya contains alkaloids that are mildly toxic if ingested in large quantities. The leaves taste extremely bitter, which deters most animals from eating them. The RHS does not list garrya as a significant hazard to pets. However, keep an eye on puppies that chew indiscriminately. If you need a guaranteed pet-safe wall shrub, consider pyracantha or climbing hydrangea instead.

How fast does garrya elliptica grow?

Garrya grows at a moderate rate of 20-30cm per year once established. A newly planted specimen typically reaches 2m within 5-6 years and its full height of 3-4m in 8-10 years. Growth is slower in the first two years while the root system establishes. Wall-trained specimens can cover a 3m x 3m area within 7-8 years with proper support.

Can I grow garrya in a container?

Garrya can grow in a large container for 5-8 years but performs best in the ground. Use a pot at least 45cm wide and deep with drainage holes. Fill with a mix of 70% John Innes No. 3 and 30% perlite. Water regularly and feed with a balanced slow-release fertiliser in April. Container-grown garrya produces shorter catkins than ground-planted specimens and needs winter protection below -10C.

Now you know how to grow garrya from planting through to wall training and pruning, explore our guide to winter-flowering shrubs to plan even more colour and structure for the coldest months.