Bonsai Training Information

Alnus cordata
Italian Alder

Italian Alder is native in Corsica, Southern Italy and parts of Western Asia. The Italian Alder is a handsome, conical shaped tree, with a dense crown and can grow up to 24 meters and more in exceptional conditions. It make a an handsome Medium to Large Bonsai.

Styles:

Formal upright, Informal Upright, Slanting, Cascade, Semi-cascade, Literate, Broom, Rock-over-root, Clasped-to-rock, Twin-trunk, Clump, Group planting, Saikei

Location:

Outdoor

Position:

Full Sun or Partial Shade. In summer protect from drying out and position in dappled shade area if required.

Watering:

It like a wet soil, keep soils moist at all times. Water well duing summer, ensuring soil doe snot dry out, in winter keep soil moist but not water logged.



Feeding:

Use a Balanced Fetiliser during growing season, feeding every 3-4 weeks.

Leaf and Branch Pruning:

During the growing season reduce to 2 leafs on stem once it has reached 4 or 5 leafs on stem. Carry out heavy branch and structural pruning in Autumn when plant is dormant. Cut away any die back to healthy tissue.

Re-potting & Growing Medium:

Every 2 years at the begining of spring or in autumn once plant goes dormant. Upto 30% of root ball may be pruned back. While the will tolerate a wide range of soils they like water retentive soils, use a heavy clay soil Loam 1 part Clay, 1 part Loam, 1 part Sharp Sand 30% ( 1 Part Akadama and 1 Part Leaf Mould or Bark)

Wiring:

In spring but protect delicate bark. It is quite flexible even with even thick branches bending quite easily. Best to use some protective raffia on thicker branches. Leave on for between 4-6 months, checking regularly for scarring.

Notes:

The Alnus do not like their roots being frozen so best to move into cool green house during the coldest of winter months.


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Print Bonsai Care Guide for Alnus cordata