Aesculus hippocastanum – Horse Chestnut

$260.00

Tax included. Shipping calculated at checkout.

Size: 40cm/45L

40cm/45L

Current Stock Height Guides

40cm/45L: 0.8m – 1m Approx.

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

Aesculus hippocastanum – Horse Chestnut is expected to grow 0.5m to 1m 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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About Your New Aesculus hippocastanum – Horse Chestnut

Aesculus hippocastanum, the horse chestnut, is a large deciduous shade tree with a straight trunk and a broad rounded crown. Big palmate leaves of five to seven leaflets build a dense summer canopy. Upright candles of white flowers marked with yellow and pink stand above the foliage in spring, followed by spiny seed cases.

It needs deep, fertile, well drained soil and a cool climate with a proper winter. Full sun to part shade suits it and it is thoroughly frost hardy. Growth is moderate at 30 to 50 centimetres a year. Hot dry summers and humid subtropical conditions do not suit it, so keep water up while it is young.

At maturity it reaches 20 to 25 metres tall with a 12 to 15 metre spread, so allow 8 to 12 metres of clear space around it. Parks, large gardens, school grounds, civic planting and wide avenues are its natural home. Deep summer shade and winter sun through bare branches is the practical trade.

Frequently Asked Questions

About Horse Chestnut

What is a Horse Chestnut tree?

Aesculus hippocastanum is a large deciduous shade tree from the Balkans, long planted in parks and avenues across the cooler parts of the world. It has a straight trunk, a broad rounded crown and big palmate leaves. Upright candles of white flowers marked yellow and pink appear in spring, followed by spiny seed cases.

How big does a Horse Chestnut grow?

It reaches 20 to 25 metres tall with a spread of 12 to 15 metres at maturity, which puts it firmly in the large tree category. Growth is moderate at 30 to 50 centimetres a year, so it takes decades to get there. Allow 8 to 12 metres of clear space around each tree.

Is it evergreen or deciduous?

Deciduous. The leaves colour yellow to brown and fall through autumn, leaving a bold branch structure over winter and letting sunlight into the space below. New growth breaks early in spring with the flower candles close behind. Expect a substantial autumn leaf drop, which is worth planning for above paths, gutters and pools.

When does it flower?

In spring, generally October and November in southern Australia, with timing shifting a few weeks by district. The flowers stand in upright panicles up to 20 centimetres tall, white with yellow and pink markings in the throat, and they are worked heavily by bees. Trees usually begin flowering at around ten years old.

Where does it grow best in Australia?

It needs a cool climate with a real winter, so Tasmania, southern Victoria, the Adelaide Hills, Canberra and the New South Wales tablelands are the districts where it does well. Deep, fertile, well drained soil gives the best results. Hot dry inland areas and humid subtropical coasts bring leaf scorch and poor growth.

Are horse chestnuts poisonous?

Yes. The glossy brown seeds, the leaves and the bark contain aesculin, which is toxic to people, dogs and horses if eaten. They are not the edible sweet chestnut sold for roasting. Children should be told the conkers are for play and not for eating, and fallen seed is worth raking up where dogs run.

How do I care for a Horse Chestnut?

Water deeply through the first few summers while the root system extends, and mulch a wide ring to keep the soil cool. It needs little pruning beyond removing crossing or damaged limbs in winter. Feed young trees in spring. Once established in a suitable climate it is long lived and largely undemanding.

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.

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Type: Garden Supplies

Enriched Planting Mix (AO Certified)

$21.95

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Uses in my Garden

Avenue Planting
Feature Tree
Shade Tree
Council or Civic Landscapes

Aesculus hippocastanum – Horse Chestnut works in an:

Heritage / Traditional Garden – timeless, classic plantings for period homes.
Woodland Garden – layered, naturalistic design under dappled light.
Formal Garden – structured, symmetrical design with clipped shapes.

Is Aesculus hippocastanum – Horse Chestnut Evergreen or Deciduous?

Aesculus hippocastanum – Horse Chestnut is an Deciduous (Defoliates throughout colder months) Tree

Mature Height & Width

Mature Height: 15m to 20m

Mature Width: 10m to 15m

Aesculus hippocastanum – Horse Chestnut is expected to grow 0.5m to 1m per year.

Growth Rate of Aesculus hippocastanum – Horse Chestnut

Aesculus hippocastanum – Horse Chestnut is expected to grow 0.5m to 1m per year.

They are considered to have a:

Medium Growth Rate

Frost Tolerance & Ideal Climate to plant Aesculus hippocastanum – Horse Chestnut

Is Aesculus hippocastanum – Horse Chestnut frost tolerant?

Aesculus hippocastanum – Horse Chestnut is Frost Tolerant – Can handle light to moderate frost once established.

Does Aesculus hippocastanum – Horse Chestnut Flower?

Aesculus hippocastanum produces large, upright “candle-like” panicles of white flowers in late spring, each marked with splashes of yellow and pink. These showy blooms rise above the foliage, creating a striking seasonal display and offering abundant pollen and nectar for insects.

Does Aesculus hippocastanum – Horse Chestnut flower?

Yes - Flowers

Flowering Period:

Spring

Flower Type:

Clustered
Pollinator-attracting

Flower Colour:

White

Is Aesculus hippocastanum – Horse Chestnut an Australian Native Tree?

No

Aesculus hippocastanum – Horse Chestnut is Native to Native to the Balkans region of southeastern Europe, particularly northern Greece, Albania, and Bulgaria; widely planted throughout Europe.

What is the Wildlife Value of Aesculus hippocastanum – Horse Chestnut ?

Its broad canopy offers excellent shade and habitat for small birds, while its large spring flower spikes provide abundant nectar and pollen for bees, hoverflies and other beneficial insects. The dense foliage also helps create a cool, sheltered micro-habitat that supports strong garden biodiversity.

How much Sunlight does Aesculus hippocastanum – Horse Chestnut need?

Aesculus hippocastanum – Horse Chestnut will thrive best in:

Full Sun
Part Shade

Preferred Soil?

Aesculus hippocastanum performs best in well-drained loam or sandy loam soils and tolerates slightly acidic to slightly alkaline conditions. It may struggle in heavy clay or poorly drained ground unless improved with organic matter to increase drainage and aeration. Keep soil evenly moist during establishment, then provide deep, occasional watering as it matures, particularly during hot or dry periods to support canopy health and strong flowering.

Is Aesculus hippocastanum – Horse Chestnut Drought Tolerant?

Is Aesculus hippocastanum – Horse Chestnut Drought tolerant?

As a young tree it requires regular watering, but once established Aesculus hippocastanum develops moderate drought tolerance. It performs best with consistent deep watering during extended dry periods to maintain leaf quality and reduce summer scorch.

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How To Plant Your Aesculus hippocastanum – Horse Chestnut

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 Aesculus hippocastanum – Horse Chestnut

Feature tree: 10 to 12 metres apart to allow the full 10-15 metre canopy to develop.

Avenue planting: 8 to 10 metres apart for a uniform, closed avenue canopy.

Aesculus hippocastanum – Horse Chestnut is expected to grow 0.5m to 1m per year.

Medium Growth Rate

Long Term Care For Your Aesculus hippocastanum – Horse Chestnut

Watering: Water deeply twice weekly through the first 12 months. Once established, reduce to once weekly in dry periods. Mulch helps maintain consistent moisture.

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 scale or caterpillar inspection in warm humid conditions is all that's needed.

Planting Your Aesculus hippocastanum – Horse Chestnut in Different Soil

Aesculus hippocastanum performs best in well-drained loam or sandy loam with a slightly acidic to neutral pH. Adaptable to a wide range of soils when drainage is improved with organic matter.

Sandy soil: Free-draining and ideal. Mulch well to maintain consistent moisture.

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

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

pH: Slightly acidic to neutral preferred. Mulch with composted leaf litter to maintain levels naturally.