Alnus jorullensis - Evergreen Trees Direct

Alnus jorullensis - Mexican alder

$370.00

Tax included. Shipping calculated at checkout.

Size: 40cm/45L

40cm/45L

Current Stock Height Guides

40cm/45L: Enquire within for height guide information.

Height guide disclaimer: Height ranges are approximate only. As living products, plant heights naturally vary between individual plants, batches, and seasons. No guarantee is given that supplied plants will fall within the stated range. If minimum heights are required, you mustconfirm current batch heights with Evergreen Trees Direct prior to purchase. Variation in height is normal and is not grounds for return, refund, replacement, or compensation.

Mature Height & Width

Mature Height: 15m to 20m

Mature Width: 10m to 15m

Alnus jorullensis - Mexican alder is expected to grow 70cm to 120cm per year.

Root Ball Dimensions

Use this as a reference when digging your planting hole. We recommend digging at least 10% wider than the dimensions below to encourage strong root development.

30cm Pot: 33cm (W) × 30cm (D)
40cm/45L Pot: 44cm (W) × 41.5cm (D)
50cm Pot / 70L Pot: 55cm (W) × 41.8cm (D)
100L Bag: 50.6cm (W) × 52.8cm (D)
150L Bag: 66cm (W) × 55cm (D)
200L Bag: 71.5cm (W) × 60.5cm (D)
300L Bag: 88cm (W) × 63.8cm (D)
400L Bag: 99cm (W) × 66cm (D)
500L Bag: 122cm (W) × 66cm (D)
750L Bag: 134cm (W) × 69cm (D)
1000L Bag: 146.3cm (W) × 71.5cm (D)
2000L Bag: 176cm (W) × 82.5cm (D)

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Phone: (03) 7042 3318

About Your New Alnus jorullensis - Mexican alder

Alnus jorullensis is one of the fastest shade trees available, adding up to 1.2 metres a year on a straight clean trunk. The Mexican Alder holds its foliage through most of the year in mild districts, behaving as a semi-evergreen rather than a true deciduous tree.

Alnus jorullensis grows to 15 to 20 metres tall and 10 to 15 metres wide, forming an upright pyramidal canopy that broadens with age. That combination of speed and clean form makes it a common specification for quick avenue planting, screening and civic shade where results are needed within a few years.

This tree is frost hardy, surviving heavy and frequent frost without damage, and grows in full sun to part shade. It tolerates a wide range of soils including wet ground, and like other alders it fixes nitrogen, which improves the soil as it grows.

Frequently Asked Questions

About Alnus jorullensis

How fast does Alnus jorullensis grow?

Very fast, at 70 centimetres to 1.2 metres per year. It is among the quickest shade trees available and delivers useful canopy within three to four years.

Is the Mexican Alder evergreen or deciduous?

It behaves as a semi-evergreen in mild districts, holding much of its foliage year round, and drops more heavily in cold winters. It is rarely fully bare.

How big does Alnus jorullensis grow?

It reaches 15 to 20 metres tall and 10 to 15 metres wide. It is a large tree suited to acreage, avenues and parkland rather than small suburban blocks.

Does it tolerate wet ground?

Yes. Like other alders it handles wet and periodically waterlogged soils well, which makes it useful along drainage lines and in low-lying positions.

Does Alnus jorullensis improve soil?

Yes. Alders fix atmospheric nitrogen through root nodules, which improves depleted soils. This makes the species useful in rehabilitation and shelterbelt planting.

Is the Mexican Alder frost hardy?

Yes. It survives heavy and frequent frost without damage, though heavier leaf drop occurs after cold winters.

How far apart should I plant it for an avenue?

Plant 8 to 10 metres apart for an avenue, and keep trees at least 10 metres from buildings, paving and services given the fast growth and eventual size.

Enriched Planting Mix (AO Certified)

$21.95

Enriched Planting Mix is a certified organic blend of Pure Magic Compost, composted animal manure, gypsum, composted coarse bark and a wetting agent, bagged in 30L. It is built to be dug through existing garden soil at planting time rather than used on its own, and the gypsum is what sets it apart from a plain compost.

Gypsum helps break up heavy clay so water and roots can move through it, while the compost and manure return organic matter and nutrient to tired ground. The coarse bark holds structure and keeps air around the root zone, and the wetting agent keeps moisture in the soil longer after rain or watering.

Use it when planting trees, shrubs, roses, fruit trees and exotic garden plants, particularly into clay. Dig a hole twice the width of the pot and 7 centimetres deeper, then mix roughly one third planting mix through the excavated soil. Spread 7 centimetres of that improved soil in the base before setting the plant in.

Frequently Asked Questions

About Enriched Planting Mix

What is Enriched Planting Mix made from?

It is a blend of Pure Magic Compost, composted animal manure, gypsum, composted coarse bark and a wetting agent. Each part has a job. The compost and manure supply organic matter and nutrient, the gypsum works on clay structure, the bark keeps air around the roots and the wetting agent holds moisture in the soil.

What plants is it suitable for?

It suits exotic garden plants, including roses, ornamental and deciduous trees, fruit trees, shrubs and perennials, and it earns its keep most on heavy clay sites. It is a planting mix rather than a potting mix, so its job is improving soil at planting time. Phosphorus sensitive natives are the one clear exception.

Is it safe for natives?

No, not for the phosphorus sensitive ones. The composted animal manure in this blend lifts phosphorus well above what Proteaceae such as Banksia, Grevillea, Hakea and Protea will tolerate, and the result can be leaf burn, dieback and plant death. Use the Native Potting Mix for those species, or plant them into unimproved local soil.

Is it certified organic?

Yes. It is a certified organic product with no chemical additives, which is why the manure and compost in it are fully composted rather than raw. That makes it sound around fruit trees and vegetable beds, and it means you are adding genuine organic matter to your soil rather than a synthetic conditioner.

How much do I need?

Work on roughly one third planting mix to two thirds of the soil you dug out of the hole. For a shrub out of a 200 millimetre pot that is only a few litres. An advanced tree going into a large hole will take considerably more. Judge the quantity by the volume of the hole rather than the size of the plant.

Can I use it in pots?

It is not a potting mix and should not be used on its own in a container. The blend is designed to be diluted through garden soil, and used straight in a pot it holds too much water and settles badly. For containers, reach for a premium potting mix, or the native mix if you are potting natives.

Does it need to be watered in?

Yes. Water the plant well several hours before you plant it, then water thoroughly again once the hole is backfilled and the soil firmed down. That first deep watering settles the improved soil around the root ball and drives out air pockets. Keep the water up over the first few months while the roots establish.

View full details

Type: Garden Supplies

Enriched Planting Mix (AO Certified)

$21.95

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Uses in my Garden

Shade Tree
Street Tree
Avenue Planting
Council or Civic Landscapes

Alnus jorullensis - Mexican alder works in an:

Woodland Garden – layered, naturalistic design under dappled light.
Heritage / Traditional Garden – timeless, classic plantings for period homes.
Low-maintenance Garden – resilient choices for easy care and year-round appeal.

Is Alnus jorullensis - Mexican alder Evergreen or Deciduous?

Alnus jorullensis - Mexican alder is an Deciduous (Defoliates throughout colder months) Tree

Mature Height & Width

Mature Height: 15m to 20m

Mature Width: 10m to 15m

Alnus jorullensis - Mexican alder is expected to grow 70cm to 120cm per year.

Growth Rate of Alnus jorullensis - Mexican alder

Alnus jorullensis - Mexican alder is expected to grow 70cm to 120cm per year.

They are considered to have a:

Fast Growth Rate

Frost Tolerance & Ideal Climate to plant Alnus jorullensis - Mexican alder

Is Alnus jorullensis - Mexican alder frost tolerant?

Alnus jorullensis - Mexican alder is Frost Hardy – Survives heavy and frequent frost without damage.

Does Alnus jorullensis - Mexican alder Flower?

Alnus jorullensis produces small clusters of yellow catkins in late winter to early spring. These modest flowers appear before the new foliage and provide an early pollen source for beneficial insects as the tree enters its growth cycle.

Does Alnus jorullensis - Mexican alder flower?

No - Doesn't Flower

Flowering Period:

Winter
Spring

Flower Type:

Not Applicable

Flower Colour:

Not Applicable

Is Alnus jorullensis - Mexican alder an Australian Native Tree?

No

Alnus jorullensis - Mexican alder is Native to Central America, including Mexico and Guatemala, where it grows naturally in montane forests and along rivers at higher altitudes.

What is the Wildlife Value of Alnus jorullensis - Mexican alder ?

Its canopy provides shelter for small birds, while its catkins support early-season pollinators such as native bees and hoverflies. The tree also contributes to soil health by naturally improving nitrogen levels, indirectly supporting surrounding plant biodiversity.

How much Sunlight does Alnus jorullensis - Mexican alder need?

Alnus jorullensis - Mexican alder will thrive best in:

Full Sun
Part Shade

Preferred Soil?

Alnus jorullensis performs best in well-drained loam or sandy loam soils and prefers slightly acidic to neutral conditions. It can tolerate occasional wetness but may struggle in heavy clay or poorly drained areas unless improved with organic matter to boost structure and aeration. Keep soil evenly moist during establishment, then transition to deep, occasional watering as the tree matures to support steady growth and moderate drought resilience.

Is Alnus jorullensis - Mexican alder Drought Tolerant?

Is Alnus jorullensis - Mexican alder Drought tolerant?

As a young tree it requires regular watering, but once established Alnus jorullensis develops moderate drought tolerance. It performs best with reliable moisture yet copes with short dry periods, especially in cooler climates or when deep watering is provided during heat.

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How To Plant Your Alnus jorullensis - Mexican alder

Site: Choose a well-drained position in full sun to part shade with room for the canopy to develop.

Soil preparation: Enrich the planting area with quality compost and aged manure for a strong establishment phase.

Hole: Dig twice as wide as the root ball and the same depth.

Planting: Position level with the surrounding soil, backfill gently, firm in, then water deeply to settle the roots.

Recommended Planting Spacing For Your Alnus jorullensis - Mexican alder

Feature tree: 3 to 4 metres apart to allow the full canopy and form to develop.

Avenue planting: 3 metres apart for a uniform soft-textured avenue.

Alnus jorullensis - Mexican alder is expected to grow 70cm to 120cm per year.

Fast Growth Rate

Long Term Care For Your Alnus jorullensis - Mexican alder

Watering: Water deeply twice weekly through the first 12 months. Once established, this is drought tolerant and only needs a deep soak during extended dry periods.

Mulching: Apply a 5 to 7 centimetre layer of organic mulch over the root zone, keeping it 5 centimetres clear of the trunk.

Pruning: Minimal pruning required. Light tip prune in late winter to maintain shape, and remove lower branches as the tree grows to develop a clean feature trunk.

Fertilising: Apply a slow-release general-purpose fertiliser in early spring and again in autumn for steady growth and consistent foliage colour.

Pest and disease: Hardy against most pests and diseases. Occasional inspection in warm humid conditions is all that's needed.

Planting Your Alnus jorullensis - Mexican alder in Different Soil

Alnus jorullensis performs best in free-draining loam or sandy loam with a neutral to slightly alkaline pH. Adaptable to a wide range of soils when drainage is sharp.

Sandy soil: Free-draining and ideal. Mulch lightly to moderate surface temperature.

Clay soil: Improve drainage with gypsum and coarse organic compost before planting.

Loam: The preferred soil for steady root development and consistent growth.

pH: Neutral to slightly alkaline preferred. Avoid waterlogging at all times.

Frequently Asked Questions

Q. What is Mexican Alder best used for?
A. It’s ideal for shade, windbreaks, and large-scale planting, with added benefits for biodiversity and soil improvement.

Q. How fast does it grow?
A. Very fast — up to 70–120 cm per year in ideal conditions.

Q. Does it tolerate wet soil?
A. Yes — it thrives in moist to waterlogged soils and improves soil quality by fixing nitrogen.

Q. What does its foliage look like?
A. Serrated, dark green leaves that turn yellow in autumn before dropping.

Q. Is it drought tolerant?
A. Moderately — it requires regular watering during establishment and becomes more drought-tolerant with age.

Q. What shape does the tree take?
A. It starts pyramidal when young and becomes rounded as it matures.

Q. Does it require much maintenance?
A. No — it is a low-maintenance tree well-suited for larger spaces and ecological planting.