Tamarisk

Tamarisk is the bonsai species with feather foliage. Where every other tree species in this catalog has either flat broadleaf foliage, needle-like conifer foliage, or scale-like cypress foliage, tamarisk produces something different — extremely fine scale leaves arranged on slender drooping shoots that give the whole canopy a soft cloud-like appearance. The texture is unmistakable and translates beautifully to bonsai compositions.

The species is also one of the few bonsai-suitable plants genuinely native to UK coastal conditions. Tamarix gallica naturalised on the south coast of England centuries ago and Tamarix anglica is sometimes recognised as a distinct UK form. Wild material is collected from coastal locations where the species grows on cliffs and shingle banks — gnarled, salt-bleached, wind-shaped specimens with substantial age character.

Beyond the foliage, tamarix produces feathery plumes of small pink flowers — Tamarix parviflora flowers in spring (April–May) on previous year's wood, while Tamarix ramosissima and T. gallica flower in summer (June–August) on current year's wood. The flowering display can be spectacular when fully developed.

Care considerations are mostly standard for a Mediterranean-origin species. Tamarix is moderately drought-tolerant once established, prefers full sun, and tolerates almost any substrate including alkaline and saline conditions that would kill other species. The salt tolerance is genuine — tamarisk grows in some of the most challenging coastal positions and accepts saline irrigation that would damage most bonsai.

The species' main pruning challenge is timing relative to flowering — different tamarix species need different pruning timing depending on whether they flower on new or old wood. Identification of which species you have matters more than for many other genera.

Daily through the growing season. Tamarix is more drought-tolerant than most deciduous bonsai but consistent moisture during active growth produces better flowering and foliage density.

In hot summer weather, twice daily for trees in shallow pots. The species' natural coastal habitat means it tolerates wind and dryness better than typical garden subjects.

In winter, regular but reduced watering. Tap water of any hardness is fine — the species tolerates the hardest UK water without complaint and accepts mild salinity that would damage other species.

Weekly liquid feed from late April through to mid-September. Slow-release organic pellets in spring and early summer.

The species responds well to consistent moderate feeding. Heavy feeding produces vigorous foliage at the expense of flowering display.

Stop feeding by mid-September.

Free-draining and tolerant. Tamarix is the most substrate-tolerant species in this catalog — it accepts everything from pure pumice to clay-rich mixes and from acidic to highly alkaline conditions.

Repot every 2–3 years on young trees, every 3–4 on mature specimens. The window is mid-February through to early April. Repot as buds swell.

Tamarix tolerates aggressive root work — up to half the root mass on healthy trees. The species recovers quickly. Collected coastal material can be substantially reduced when first lifted.

Tamarix pruning timing depends on species — this matters more than for most genera.

For spring-flowering species (T. parviflora): flowers form on previous year's wood, so prune after flowering (June). Aggressive winter pruning eliminates the year's display.

For summer-flowering species (T. gallica, T. ramosissima): flowers form on current year's wood, so prune in late winter or early spring (February–March). This encourages strong new growth that bears the flowers.

If you're uncertain which species you have, observe one full year's flowering cycle before doing significant pruning.

Beyond timing, pruning is forgiving. The species back-buds reliably on old wood and tolerates hard cutbacks. Through the growing season, let new shoots extend to 8–10cm then cut back. Pinch every 3–4 weeks.

Defoliation isn't a useful technique on tamarix — the scale-like leaves are already small and the species responds poorly to full defoliation.

Wire after new growth hardens in early summer or on bare branches in winter. Bark is reasonably forgiving — apply moderately loose and check fortnightly. Aluminium for most work, copper for thicker structural branches.

The species' slender flexible branches are easy to wire on young material. Older wood becomes more brittle — major bends on heavy wood need raffia wrapping.

Informal upright suits the species. The natural windswept growth habit of coastal tamarix suggests windswept and cascade styles — both of which work brilliantly. Twin-trunk and clump styles work well.

The species' soft cloud-like foliage and naturally bent trunk character suit naturalistic compositions referencing coastal or windswept locations. Forest plantings work but are uncommon.

Formal upright doesn't suit the species. Aim for compositions that emphasise the distinctive foliage texture and weather-shaped trunk character.

Hardy across most of the UK with no protection needed in normal winters. The species is rated H5 — hardy through southern English winters, may benefit from sheltered position in colder UK regions.

In Scotland and exposed northern positions, light shelter in severe winters is sensible. The species' coastal heritage means it tolerates wind better than most species but extreme cold combined with wet conditions can damage roots.

Never bring indoors.

Very easy from hardwood cuttings in late winter or semi-hardwood cuttings in summer. The species' coastal heritage means it's adapted to colonising via vegetative propagation and roots from almost any pruned section pushed into substrate. Air layering also works well. Collected coastal material is the best source for dramatic trunk character.

Generally healthy. Tamarix has fewer disease and pest problems than most ornamental species.