Planting Fruit Trees: The Mistake That Holds Your Tree Back for Years

A mistake here can hold your tree back for years.

Spring brings new fruit trees and high hopes: an apple or cherry tree is meant to turn the garden into a small paradise. Yet the display of blossom often fails to appear, even when the tree looks healthy. The cause is not the variety or the weather, but one particular area of the trunk that must never end up below ground.

The most common planting mistake: the tree is planted too deeply

Many amateur gardeners want to give a newly bought fruit tree “good protection”. They therefore dig a deep hole, add plenty of soil and firmly cover the lower trunk. It may look secure and caring, but it is disastrous.

Fruit trees planted too deeply are effectively suffocated – they grow poorly and produce few or no blossoms.

Why excess soil around the trunk suffocates the tree

The base of the trunk is not designed to remain in damp soil permanently. It lacks air, moisture builds up, and this damages the sensitive bark.

• constant dampness around the base of the trunk
• increased risk of rot and fungal infection
• disruption to the flow of sap through the wood

Below the surface, the trunk begins to rot. Although this can remain hidden for a long time, it interrupts the movement of nutrients and water. The tree survives, but seems “frozen”: there is little growth, hardly any new shoots and no flowers.

Moisture and fungi: the hidden threat beneath the soil

Bark on the trunk behaves differently from root skin. Roots can cope with continually moist soil, whereas the base of the trunk cannot. It softens, develops small cracks and creates ideal entry points for fungi and pathogens.

Once inside the trunk wood, they spread quietly and gradually. On the outside, you may see only an inconspicuous discolouration or slightly cracked bark, while inside the tree is fighting to survive. Producing blossoms is no longer a priority in this situation.

The crucial trunk area: root collar and graft union

To plant fruit trees correctly, you need to recognise two areas: the root collar and the graft union. This is precisely where the critical mistake is made.

How to identify the root collar and graft union correctly

The root collar is the point where the roots finish and the trunk starts. Directly above it, usually only a few centimetres higher, is the graft union. It can look like a small swelling, a scar or a slight bend in the wood.

At the graft union, the chosen variety – such as a flavoursome apple – has been “grafted” onto a robust rootstock.

Without grafting, many popular garden varieties would not exist at all. The rootstock provides resilience, suitable vigour and often an earlier crop. Burying this point removes exactly those advantages.

What happens when the graft union is below ground

If the graft union is beneath the soil, the scion variety tries to grow its own roots. Internally, the tree “separates” itself from the rootstock. This behaviour demands an enormous amount of energy.

The result:

• the rootstock’s characteristics (resilience, yield and eventual height) are lost
• the tree puts its energy into survival rather than producing blossoms
• fruiting is delayed by years or may fail altogether

This explains why two apparently identical trees in the same garden can perform so differently: one flowers after only a few years, while the other appears to be a permanent problem – often because of just a few centimetres of soil in the wrong place.

How to plant fruit trees properly in March

In early spring especially, when many new fruit trees are being planted, planting depth determines whether the outcome is success or frustration.

Ideal height: keep the graft union above soil level

The most important rule is:

The graft union must sit 5 to 10 centimetres above the final soil level – and the root collar must remain exposed.

The tree will then sit visibly a little “higher”, with the scar clearly recognisable above the soil. It stays dry and receives air and sunlight. This allows the tree to direct all its energy into new growth, blossoms and, later, fruit.

A trick to prevent the soil sinking later

Freshly loosened soil contains plenty of air and settles over time. Unless you account for this, the tree can end up too deep again only weeks after planting.

A practical approach:

• Form a small, firm mound of soil at the bottom of the planting hole.
• Spread the roots out in a fan shape over this mound.
• Lay a cane or spade handle across the hole to create a height guide.
• As you backfill, check that the graft union remains 5–10 cm above this line.
• Firm the soil gently, but do not compact it until it is hard.

This keeps the tree at the correct height even after rainfall and watering, so it does not “sink” into the ground.

Warning signs: how to spot a fruit tree planted too deeply

The issue is rarely obvious in the first year. Many trees initially look acceptable despite being planted incorrectly. The warning signs tend to emerge later.

Typical symptoms in spring

During the first sunny weeks, look particularly for these signs:

• little or no growth on young shoots
• yellowish, limp leaves despite adequate watering
• flower buds shrivel and fail to open
• the tree looks generally “tired” and frozen in place

A fruit tree that barely grows or flowers for years is very often simply planted too deeply.

Remedy: expose the base of the trunk

Once you have identified the mistake, it can often still be corrected. This requires a careful touch rather than major tools.

Proceed as follows:

• Carefully remove soil around the trunk using your hand or a small hand trowel.
• Create a shallow hollow until the root collar and graft union are exposed again.
• Take care not to damage any roots or injure the bark.
• Position the watering basin slightly further out, rather than directly against the trunk.

The tree will not respond overnight. However, the following season often brings noticeably stronger shoot growth and, later, its first flowers.

Checklist for perfect fruit tree planting

The key rules at a glance

Step	What should you look for?
Prepare the planting hole	Make it wide and loose, forming a small mound of soil at the base
Position the tree	Spread out the roots, with the graft union clearly visible above
Check the height	Set the graft union 5–10 cm above soil level
Backfill with soil	Avoid compacted layers, firm only lightly and leave the root collar exposed
Water	Create the watering basin a short distance from the trunk

What a properly planted tree gives back

Anyone who gives their fruit tree this ideal start will be rewarded. An exposed root collar and a dry, well-ventilated graft union support a strong root system. The tree can absorb nutrients and water without difficulty, experiences less stress and responds more reliably to periods of heat or sudden cold snaps.

Over the years, the difference becomes clear: instead of stunted twigs, the branches carry increasingly abundant fruit. The crown develops evenly, the tree remains vigorous, and a successful harvest is often possible without extensive chemical treatment.

Why fruit trees are almost always grafted – and what this means

Most apple, pear, cherry and plum trees sold commercially are grafted. This means that a scion variety with good fruit is joined to a rootstock with particular qualities, such as reduced vigour or better adaptation to the soil.

The graft union is therefore a key junction in the tree. It combines the strengths of both parts. If it is mishandled or buried, the tree loses this benefit. This is exactly why planting depth matters so much – it helps determine whether the tree remains relatively small and productive, or grows wildly and unpredictably.

Anyone taking another critical look at their fruit trees in the garden will usually spot this scar quickly. If it sits just above the soil, everything is as it should be. If it has disappeared below ground, carefully exposing it is worthwhile – often the crucial step towards the fruit tree originally imagined.