Autumn is a season of quiet, warm colors and longer evenings at home. A bouquet of cut flowers brings light and mood into the interior, but to enjoy it for longer, we need to understand a little more about the science behind the freshness of flowers.

What happens when a flower is cut?

Once the flower is separated from its root system, it relies solely on the stem to take in water and nutrients.

• The xylem (the plant’s vascular tissue) transports water to the petals.
• If the vessels become blocked with air or bacteria, the flower wilts quickly.

The factors that determine the life of a cut flower

1. Temperature

At low temperature the flower’s metabolism slows down. This means less evaporation and slower aging.

• The optimal temperature for most cut flowers is from 4°C to 8°C (which is why florists keep bouquets in cold rooms).
• At home it is good for the bouquet to stay away from radiators and direct sunlight.

2. Water

Clean water is the most important factor.

• Cutting the stems at a 45° angle increases the surface area for absorption.
• Right after cutting, the stems must be placed in water – otherwise an air “plug” forms.

3. Bacteria

Bacterial contamination is a major problem.

• A study in the Journal of Applied Microbiology (2018) showed that changing the water regularly every 48 hours reduces bacterial growth by up to 90%.
• Even simply washing the vase with warm water and soap is enough to extend the life of the bouquet by 2–3 days.

4. Nutrients

Special solutions for cut flowers contain a combination of:

• sugar – a source of energy;
• acid (citric or ascorbic) – to maintain a low pH and better water uptake;
• biocide – to suppress bacteria.

5. Ethylene – the invisible enemy

Ethylene is a plant hormone that accelerates aging. It is released by fruits such as apples and bananas.

• Studies show that exposing cut roses to ethylene even for a few hours leads to accelerated petal drop.
• That is why you should never keep the bouquet next to the fruit bowl.

Practical tips for autumn

1. Trim regularly – shorten the stems with a sharp knife every two days.
2. Change the water – fresh, clean water is the best “elixir” for flowers.
3. Avoid warm zones – radiators, air conditioners and direct sun shorten the life of flowers.
4. Use additives – if you do not have a professional solution, mix 1 teaspoon of sugar + a few drops of lemon juice in 1 liter of water.
5. Keep “incompatible” flowers apart – daffodils, for example, release toxins into the water and should stand separately before being combined with other flowers.

Caring for cut flowers is a combination of knowledge and attention. When we understand the processes – from capillary water uptake to the influence of ethylene – we can extend their beauty at home by days, even weeks.

Autumn gives us a natural advantage – lower temperatures and seasonal resilient flowers. It is enough to apply a few scientifically based tips to turn the bouquet into a source of joy and coziness throughout the whole month.