Growing Hydrangeas in Pots: Choosing Varieties, Planting and Care
Hydrangeas grow well in pots when the variety, container and compost are chosen with their eventual size and moisture needs in mind. Learn how to plant, water, feed and protect...
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Alnus glutinosa
Common Alder
Alnus glutinosa, the common alder, is a native tree well suited to the wet ground in which many other trees struggle. Rounded bright green leaves form a broadly conical crown, while grey-purple buds and developing catkins give useful winter detail. It is exceptionally hardy and tolerant of exposed or coastal sites, but needs substantial space at maturity.
✅ Native tree well adapted to wet soils
✅ Catkins add interest before spring growth
⚠️ Can eventually reach around 20–25m
Plant Details
Flowering Months
Size
- Max Height
- 12.0 m +
- Max Spread
- 4.0 m — 8.0 m
- Growth Habit
- Tall, narrow growth habit with strongly vertical main stems.
Planting Position
- Sunlight 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
- Aspect 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 Exposure describes how sheltered or exposed a plant’s position is, particularly to wind and weather.
- Exposed / Sheltered
- Hardiness Hardiness indicates how well a plant tolerates cold conditions outdoors. Higher ratings generally mean greater frost tolerance.
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(< −20 °C) Extremely hardy
Ideal Soil Conditions
- Soil Type Soil type describes the texture of the soil (clay, sand, loam, chalk). This affects drainage, nutrients and how roots grow.
- Soil Moisture 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 / Poorly-drained / Free draining
- Soil pH Soil pH measures how acidic or alkaline the soil is. It affects nutrient availability and can impact plant growth.
Plant Uses & Merits
- Uses
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- Coastal Areas
- Hedging / Screening
- Merits
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- Low Maintenance
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Mophead, lacecap, panicle, smooth, oakleaf and climbing hydrangeas differ in far more than flower shape. This guide compares their growth, flowering habit, preferred position and garden use to help you...
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How to Grow Hydrangeas in Ireland: The Complete Guide
Hydrangeas are well suited to many Irish gardens, provided the type is matched to the position. This guide covers choosing Hydrangeas, light and soil, planting, watering, feeding, pruning, flower colour,...
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Climbing hydrangeas are self-clinging, shade-tolerant woody climbers that can cover substantial walls, fences and mature trees, but they establish slowly and need a permanent position. This guide explains siting, support,...
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Best Hydrangeas for Small Gardens
Small gardens can accommodate hydrangeas very well when mature size and habit are considered from the outset. Compare compact mophead, panicle, oakleaf and lacecap choices that give substantial summer interest...
