Why gardeners put a metal spoon in a flowerpot

On some balconies, it is not a plant stake that protrudes from the soil, but an old metal spoon.

Few people realise what lies behind this quirky trend.

What may look like a joke has long been circulating in gardening groups and neighbourhood chats: people are pushing old metal spoons into their flowerpots, directly into the soil beside ficus plants, geraniums or herbs. Rather than being a sign of untidiness, it is a deliberate balcony gardening trick intended to make potted plants more resilient.

How the spoon in a flowerpot became an insider tip

Metal in the garden is not a new idea. For years, many gardeners have placed copper coins in pots to deter slugs or improve drainage. The spoon-in-a-pot method follows the same make-do principle: an everyday object is inserted into the soil in the hope that it will subtly alter the conditions around the plant.

The method itself is straightforward: place a clean, unpainted and uncoated metal spoon in the pot. Insert it so that the metal section is firmly in contact with the soil. It makes little difference whether the handle points upwards or downwards. What matters is the contact between the spoon and the growing medium.

Anyone using small pots or growing plants with exceptionally fine, delicate roots should proceed carefully. In very confined containers, a spoon can take up too much room or damage roots as it is pushed in. There is considerably more space to work with in larger houseplant pots or window boxes.

What a spoon is supposed to do for plants

The basic premise is that soil in a flowerpot is limited in volume. Nutrients are used up more quickly than they are in a garden bed. Over time, the growing medium becomes depleted, particularly when plants are rarely repotted. This is where the metal spoon is meant to help.

The spoon is considered a mini reservoir: over a long period, tiny amounts of metal ions may pass into the soil and slightly alter its nutrient profile.

Some hobby gardeners say that plants with a spoon in the pot grow more evenly, display fewer signs of “exhaustion” and retain a rich green colour for longer. The idea is especially appealing for older container plants that people would rather not repot every year.

At the same time, many experienced plant enthusiasts temper these expectations. Stainless-steel and aluminium spoons release only extremely small quantities of substances. They are therefore far from a miracle fertiliser. So far, there are no scientific studies demonstrating a clear effect on growth or flowering behaviour.

Mechanical protection and light reflections

The second frequently mentioned benefit is unrelated to nutrients and is instead based purely on physical effects. A spoon can serve as a barrier, creating a small obstacle around the stem that may disrupt some pests.

There are also the light reflections to consider: polished metal reflects sunlight or artificial light. Some insects and crawling pests avoid such shiny surfaces. On a balcony, where just a few leaf-eating attacks can ruin entire pots, gardeners are often happy to try any non-toxic deterrent.

• A spoon acts as a small obstacle at the base of the plant
• Its shiny surface may confuse certain insects
• No poison, no sprays and reusable material

Even so, it is worth taking a realistic view. This will not completely keep away slugs, fungus gnats or aphids. Anyone dealing with a serious pest problem will need additional measures, such as yellow sticky traps, physical barriers or improved ventilation.

How balcony and indoor gardeners can use the spoon trick properly

Anyone who is curious and wants to test the effect themselves should take a structured approach. The appeal of the trick is that it remains simple, inexpensive and low-risk.

Step-by-step guide

1. Choose a suitable spoon: An old stainless-steel spoon is ideal, provided it is uncoated and has no decorative paint.
2. Clean it thoroughly: Remove grease, washing-up liquid residue and burnt-on marks so that nothing unwanted is introduced into the soil.
3. Select its position in the pot: Push the spoon in closer to the edge of the pot, rather than directly beside the stem.
4. Insert it slowly: Apply gentle pressure and watch for resistance to avoid cutting through thicker roots.
5. Observe the plant: Over several weeks, check whether growth, leaf colour or pest pressure visibly changes.

Many gardeners use this trick only with ornamental plants. Some are more hesitant to use it in pots containing herbs or edible vegetables, as they do not want any additional metal release into the soil, even though the amounts are likely to be extremely low.

Where a spoon may help – and where it may not

A spoon is no substitute for proper basic care. Good soil, suitable watering habits and occasional nutrient feeds remain essential. If the soil is heavily compacted and exhausted, even five spoons will not save the plant.

What to consider when putting metal in a flowerpot

For some people, metal in the growing medium may initially seem strange. In reality, metal ions occur in almost every soil. Plants require certain metals in minute amounts, including iron, zinc and manganese. Without these trace elements, many houseplants develop deficiencies, their leaves turn yellow or their shoots remain weak.

A stainless-steel spoon releases these substances only very slowly and in very small quantities. This explains why no dramatic results should be expected. Metals that corrode heavily would theoretically be more “active”, but they introduce other issues, including rust and uncontrollable reactions in the soil. Scrap cutlery, painted costume jewellery and rusty items are therefore clearly unsuitable.

Anyone wishing to try the trick should focus on quality: plain, durable cutlery rather than cheap decorative pieces with coatings. This keeps the risk low that unsuitable substances will leach into the pot.

How to test the effect properly

Rather than relying on stories from online forums, it is easy to assess the effect yourself. Place two plants that are as similar as possible side by side, in identical pots with the same soil and the same watering schedule. Put a spoon in one pot and leave the other without one.

Over a longer period, watching the following can provide an indication of any differences:

• Leaf colour and sheen
• Number of new shoots or leaves
• Frequency of pest infestation
• Plant stability: does it lean or break easily?

Small differences may simply result from natural variation. Plants respond individually, even under identical conditions. Testing several pairs of pots will give a clearer picture of whether the spoon plays any part at all.

More simple tricks for strong potted plants

The spoon in the pot is one of a range of practical balcony gardening ideas. Many gardeners, for example, swear by broken terracotta pieces or pebbles at the bottom of a pot to prevent waterlogging. Others use old wooden sticks to check how moist the soil really is below the surface when watering.

Those growing plants in tight containers can achieve a great deal with a few simple steps: occasionally loosening the surface with a fork, applying fertiliser selectively during the growing season and choosing a suitable position with enough light. These fundamentals generally make a far greater difference than any metal-based trick.

The spoon therefore remains an appealing experiment: it requires hardly any effort, costs next to nothing and carries a hint of gardening mystery – and it may perhaps offer a small benefit to plants already having to battle on in their pots.