Fertilizing Italian Alder: A Practical Guide

By Mohamad Adli Adli Kusuma

The Italian Alder ( Alnus cordata ) is a fast-growing, deciduous tree native to southern Italy and Corsica, possessing several distinctive botanical characteristics: Habit: Typically grows with a straight trunk and a pyramidal or conical, dense, dark green crown. It can reach heights of 20-25 meters (65-80 feet), exceptionally up to 28 meters (90 feet), with a trunk diameter of 70-100 cm (30-40 inches). Young trees exhibit predominantly vertical growth. Bark: The bark is smooth and darkish red when young, later becoming greyish-brown to blackish-grey and developing deep fissures with age. It lacks the papery texture seen in birch bark. Leaves: The leaves are simple, alternate, and ovate or circular-ovate in shape, with a distinctly heart-shaped (cordate) base, giving the tree its species name. They are typically 5-12 cm (2-4 ¾ inches) long and have a finely serrated (dentate and crenate) margin and a slightly pointed tip. The upper surface is a rich, glossy dark green and smooth, while the underside is lighter with 6-8 clearly visible secondary veins and reddish hairs in the vein axils. Notably, the Italian Alder has a long leaf season, appearing in March-April and often persisting until November-December, sometimes even later in warmer urban environments, without significant autumn color change (they tend to turn brown). Inflorescences, Flowers, and Fruits: Italian Alder is monoecious, meaning both male and female flowers are found on the same tree. Male Inflorescences: These are pendulous, tassel-like catkins, reddish in color, and can be quite prominent, reaching 7-11 cm (up to 10 cm or 4 inches) long. They typically appear in groups of 1-4 to 4-6 at the ends of shoots and are bright yellow with pollen at anthesis (early spring, before the leaves emerge). Female Inflorescences: These are erect, much shorter (0.9-1.5 cm) catkins located subterminally on the shoots. At anthesis, the red stigmas are clearly visible.

• Format: Paperback
• Language: English
• ISBN: B0F65S5MNP
• ISBN13: 9798281113168
• Release Date: April 2025
• Publisher: Independently published
• Length: 39 Pages
• Dimensions: 11.0" x 0.1" x 8.5"