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5 Common Tree Planting Mistakes and How to Avoid Them

5 Common Tree Planting Mistakes and How to Avoid Them

The five planting mistakes that kill trees, and how to avoid each one.

Care GuidePlanting GuideTree Care

A great tree starts with great planting. Here are five planting habits that set every tree up to thrive, with worked examples.

Habit 1: Plant at grade

Set the root flare at or just above soil level. This is the simple move that keeps the trunk dry and the roots happy. Example: Magnolia 'Little Gem'.

Habit 2: Build in drainage

Olives and other Mediterranean trees love free-draining soil. A quick drainage check before planting sets them up for decades of strong growth. Example: Olea europaea.

Habit 3: Native-friendly feeding

Australian Proteaceae like Banksia thrive on low-phosphorus, native-formulated fertiliser. Match the feed to the species and they reward you with flower and form. Example: Banksia integrifolia.

Habit 4: Summer planting made easy

Summer planting is a great way to get trees going - water morning and evening for the first two weeks, mulch deeply, and the roots settle in beautifully. Spring, autumn and winter also work well. Example: Lagerstroemia Natchez Crepe Myrtle.

Habit 5: Match tree to light

Japanese Maples love filtered light and a sheltered spot - position them where they'll glow rather than bake. Example: Acer palmatum.

The simple recipe

Dig wide, plant at grade, backfill with native soil, water deeply, mulch out to the dripline. Match species to climate and site, and the tree does the rest.

1. Magnolia grandiflora 'Little Gem' (Little Gem Magnolia)

Magnolias suffer most when planted too deep or watered too lightly.

Type
Evergreen feature tree
Height
4 to 6 m
Width
2 to 3 m
Growth rate
Moderate
Foliage
Dark green
Form
Upright
Conditions
Full sun to part shade
Maintenance
Low
Best for
Demonstrating correct planting depth.

Why choose it

It rewards correct planting and punishes shortcuts.

Perfect pair

Magnolia feature with a Bay hedge.

Tips for planting

Plant root flare at grade. Water deeply, infrequently.

Plant it right, it lives forever.

Shop Magnolia grandiflora 'Little Gem'

2. Olea europaea (Olive)

Olives die in heavy wet soils more often than from any other cause.

Type
Evergreen feature tree
Height
4 to 6 m
Width
3 to 4 m
Growth rate
Moderate
Foliage
Silver-grey
Form
Open rounded
Conditions
Full sun, free-draining
Maintenance
Low
Best for
Demonstrating drainage requirements.

Why choose it

Olives need free-draining soil. Overwatering kills.

Perfect pair

Olive feature with a Bay hedge.

Tips for planting

Plant on a slight mound in heavy soil.

Drainage first, watering second.

Shop Olea europaea

3. Banksia integrifolia (Coast Banksia)

Banksias die fast from phosphorus-rich fertilisers and high-P potting mix.

Type
Evergreen native tree
Height
6 to 10 m
Width
3 to 5 m
Growth rate
Fast
Foliage
Silver-green
Form
Upright open
Conditions
Full sun
Maintenance
Low
Best for
Demonstrating native fertiliser rules.

Why choose it

Proteaceae natives are phosphorus-sensitive.

Perfect pair

Banksia feature with a Westringia hedge.

Tips for planting

Use native-formulated fertiliser only.

Right fertiliser, right tree.

Shop Banksia integrifolia

4. Lagerstroemia indica 'Natchez' (Natchez Crepe Myrtle)

Crepe Myrtles suffer when planted in deep summer instead of winter.

Type
Deciduous feature tree
Height
6 to 8 m
Width
4 to 5 m
Growth rate
Fast
Foliage
Green turning red autumn
Flowers
White summer
Form
Vase-shaped
Conditions
Full sun
Maintenance
Low
Best for
Demonstrating seasonal timing.

Why choose it

Dormant planting establishes far stronger than peak-summer planting.

Perfect pair

Crepe Myrtle feature with a Bay hedge.

Tips for planting

Plant in winter while dormant.

Time it right.

Shop Lagerstroemia indica 'Natchez'

5. Acer palmatum (Japanese Maple)

Japanese Maples look their best in filtered light - pick a sheltered spot and they reward you with rich, clean colour.

Type
Deciduous feature tree
Height
3 to 5 m
Width
2 to 4 m
Growth rate
Slow to moderate
Foliage
Palmate
Form
Spreading
Conditions
Part shade
Maintenance
Low
Best for
Demonstrating site selection.

Why choose it

Choosing the wrong spot wastes a beautiful tree.

Perfect pair

Japanese Maple feature with a Bay hedge.

Tips for planting

Plant where it gets morning sun and afternoon shade.

Right plant, right place.

Shop Acer palmatum

Compare at a glance

CultivarHeightWidthFormFoliageBest if you…
Magnolia grandiflora 'Little Gem'
Little Gem Magnolia
4 to 6 m2 to 3 mUprightDark greenDemonstrating correct planting depth.
Olea europaea
Olive
4 to 6 m3 to 4 mOpen roundedSilver-greyDemonstrating drainage requirements.
Banksia integrifolia
Coast Banksia
6 to 10 m3 to 5 mUpright openSilver-greenDemonstrating native fertiliser rules.
Lagerstroemia indica 'Natchez'
Natchez Crepe Myrtle
6 to 8 m4 to 5 mVase-shapedGreen turning red autumnDemonstrating seasonal timing.
Acer palmatum
Japanese Maple
3 to 5 m2 to 4 mSpreadingPalmateDemonstrating site selection.