The moment a flower is harvested, a race against time begins. For British growers, the goal is to harvest at the exact moment so that when it is delivered to your door, it’s at peak perfection. However, a flower is a living, breathing organism that is not interested in how it looks to you. Even after it is cut from its roots, it continues to transpire (losing water through its petals and leaves) and metabolise its stored sugars.
The journey from grower to your door
When you order British flowers, they often travel through a sophisticated "cold chain." This involves keeping the flowers at a constant low temperature to slow down their metabolism. But the most critical stage is the "last mile"; the journey from the packing shed to your hallway. During this time, flowers are often out of water. Without intervention, the stems can dry out, leading to air embolisms (air bubbles) that block future water uptake.
What happens to flowers during transit?
In a cardboard box or a courier van, flowers face several stressors:
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Physical Shock: Constant movement can bruise delicate petals.
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Dehydration: Without a water source, the cells lose turgidity, leading to the dreaded "head drop."
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Ethylene Gas: Some flowers are sensitive to ethylene (a ripening gas produced by fruit or older flowers), which causes them to age prematurely.
To combat these issues, modern floristry has moved beyond simple wet paper towels. Enter the era of specialised hydration technology.
How Transit Gel Protects Flowers During Delivery
If you have ever received a bouquet that felt slightly "jelly-like" at the bottom, you have encountered hydration and transit gel. This isn't just a gimmick; it is a vital hydration tool designed for the final stage of the supply chain.
What makes transit gel different from wet wadding or water sachets?
Historically, florists used "wet wadding", basically paper or sponge soaked in water and wrapped in plastic. The problem? It leaks. If water touches the flower heads inside a box, it encourages botrytis (grey mould).
Transit gel is thixotropic. In simple terms, this means it is a gel that stays put while stationary but liquefies under gentle pressure. When a grower pumps this gel into a bouquet, it surrounds every single stem, even the hidden ones in a tight spiral arrangement. Because it is a gel, it doesn't spill, yet it releases water consistently to the stem ends.
How long can flowers stay in transit gel?
Most professional-grade hydration gels are designed to keep flowers healthy for up to 72 hours. This provides a safety net for next-day deliveries or the occasional courier delay. However, the gel is a temporary "packed lunch" for your flowers, not a permanent home. Once they arrive, they need to transition to a vase of fresh water to begin their full bloom cycle.
How to remove transit gel when your flowers arrive
Once your flowers arrive, you should remove the gel, which is a simple task:
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Hold the stems over a sink.
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Gently wipe away the bulk of the gel with a paper towel or your hand.
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Rinse the remaining residue with cool tap water. The gel used by British Flowers Direct is water-miscible and non-toxic, meaning it’s safe to wash down the drain or add to your compost heap.
How We Test: From Studio Vases to Your Living Room
At British Flowers Direct, we don’t just hope the flowers last when they arrive; we prove it. Quality assurance is a two-pronged approach that combines laboratory-style monitoring with real-world "stress tests."
Monitoring stems in our studio - the daffodil test
In our studio, we conduct controlled vase life trials. We line up varieties, such as different cultivars of British daffodils, in vases. We monitor everything: how quickly the buds crack, the strength of the neck, and the clarity of the water. This allows us to give customers accurate expectations. If a specific variety doesn't meet our 7-day minimum standard, it doesn't make the cut for our deliveries.
Our trusted home tester network: real consumer conditions
Studio conditions are often "perfect": cool, away from drafts, and out of direct sunlight. But we know real life involves central heating, curious pets, and the occasional forgotten water top-up.
We send flowers to a network of home testers across the UK in the same packaging that we would use for clients. These testers then treat the flowers exactly as a customer would. They report back with photos and "day-by-day" logs. This data is invaluable because it tells us how our cut flower care instructions perform in the wild. If a tester’s anemones droop on day three, we investigate why and update our guidance to ensure your experience is flawless.
The Science of Post-Harvest Flower Care
Once the flowers are in your hands, the science of post-care for flowers begins. It’s not just about "giving them a drink"; it’s about managing the chemistry of the water.
What does flower food actually do?
That little sachet of powder is more than just "plant vitamins." Most flower food contains three essential components:
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Carbohydrates (Sugar): Flowers have often been cut off from their energy source (the roots and sun-fed leaves). Sugar provides the energy needed for a bud to actually open.
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Acidifiers: Most tap water is slightly alkaline. Flowers prefer a pH of around 3.5 to 5.0. Acidifiers lower the pH, which helps the water travel up the stem more efficiently.
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Biocides/Bleach: This is the most important part. Bacteria love sugar water. They multiply rapidly and plug the "veins" (xylem) of the flower stem. Biocides keep the water clear of these blockages.
Why clean water matters as much as the treatment
Even the best flower food can't overcome a dirty vase. Bacteria are the number one enemy of vase life. Always wash your vase with hot, soapy water (or even a drop of bleach) before use. If the water looks cloudy after a few days, it’s a sign of a bacterial bloom, and it’s time for a fresh change and a stem re-trim.
Special Care for Hollow-Stemmed Flowers: Anemones & Gerbera
Some flowers are more "difficult" than others. Hollow-stemmed flowers, like anemones and gerberas, have a unique anatomy that makes them particularly prone to wilting.
Why hollow stems need a chlorine-based treatment
Because the stems are hollow, they act like a straw. If bacteria get inside that straw, they don't just block the bottom; they colonise the entire interior. This causes the stem to soften and "kink" just below the flower head.
Chrysal CVBN — what it is and how to use it
For professional florists and serious enthusiasts, Chrysal CVBN is the gold standard. It is a slow-release chlorine tablet. Unlike standard flower food, it focuses heavily on water hygiene. It neutralises the harmful effects of narcissus slime (which can kill other flowers in a mixed bouquet) and keeps the water "surgical grade" clean.
Pro Tip: If you don't have CVBN tablets, a tiny drop of household bleach (about 5ml per litre) can act as a DIY alternative to keep the bacterial count low in your vase.
The anemone rescue: a real home-tester story
We recently had a home tester report that their anemones had completely "fainted" within 12 hours of arrival. The stems were bendy, and the heads were touching the table. Instead of throwing them away, we advised a "rescue mission":
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Re-cut the stems by 2cm.
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Place them in a clean vase with fresh water and a dash of bleach.
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Wait 24 hours.
The result? The anemones stood bolt upright, fully turgid and vibrant. This proved that the flowers weren't "dead"; they were simply suffering from a bacterial blockage that prevented them from drinking.
Step-by-Step Post-Care Guide for Your Flowers at Home
To ensure your British flowers live their longest, best life, follow this definitive checklist.
When you receive your flowers
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Remove the Gel: As discussed, rinse any transit gel from the stems under cool water.
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The 45-Degree Cut: Use sharp, clean scissors or secateurs to cut at least 2–3cm off the bottom of each stem at a 45-degree angle. This increases the surface area for water uptake and prevents the stem from sitting flat against the bottom of the vase, which would block the "straw."
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Strip Lower Foliage: Ensure no leaves are submerged in the water. Leaves rot quickly, creating a bacterial soup that will kill your flowers.
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The Right Vase: Fill a clean vase with room-temperature water and add your flower food.
Daily care tips to extend vase life
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Location, Location, Location: Keep your flowers away from direct sunlight, radiators, and air conditioning vents. Also, keep them away from the fruit bowl; ripening bananas emit ethylene gas that will make your flowers wilt faster.
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The Top-Up: Flowers drink a surprising amount of water in the first 24 hours. Check the level daily.
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The Refresh: Every 2–3 days, completely change the water, wash the vase, and re-trim the stems by another 1cm.
When flowers need a little extra help
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The Scalding Trick: For woody stems like hydrangeas or roses, dipping the bottom 2cm of the stem in boiling water for 30 seconds can help clear sap blockages before placing them in room-temperature water.
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The Rescue Soak: If a flower head is drooping, try laying the entire flower (head and all) in a sink of cool water for an hour to rehydrate the petals directly.
Frequently Asked Questions About Flower Transit & Post-Care
What is transit gel, and how does it work for cut flowers?
Transit gel is a thixotropic, water-releasing gel specifically formulated for the final stage of the cut flower supply chain. Unlike water or wet wadding, it doesn't spill onto packaging or flower heads. It liquefies under gentle pressure, so it can be pumped directly into bouquets, delivering hydration to every stem, including inner stems in spiral bouquets, for up to 72 hours in transit.
How long can flowers stay in transit gel?
Flowers should be kept in transit gel for a maximum of 72 hours (3 days). Before placing stems into a vase, the gel should be removed from the base of the stems. The gel is water-miscible and can be rinsed away down the sink, composted, or disposed of with household waste.
What is the best post-care treatment for cut flowers at home?
When you receive cut flowers, re-cut the stems at a 45-degree angle, place them in a clean vase with fresh, cool water, and add flower food. Flower food contains a slow-release sugar to nourish blooms and a chlorine-based component to prevent bacterial growth. For hollow-stemmed flowers like anemones or gerbera, a chlorine-based treatment such as Chrysal CVBN is particularly effective.
Why are my anemones drooping even after being put in water?
Drooping or bendy anemones after delivery are often caused by bacterial build-up in the water rather than the flowers being damaged. Anemones have hollow stems and are especially vulnerable. Re-cutting the stems and adding a small measure of bleach (approximately 5ml) or a specialist chlorine-based flower treatment to clean water can revive them dramatically — often within 24 hours.
What is Chrysal CVBN, and which flowers does it work best for?
Chrysal CVBN is a chlorine-based tablet used as a post-harvest flower treatment. It is particularly effective for hollow-stemmed varieties such as anemones and gerbera, where bacteria can quickly accumulate inside the stem. It keeps vase water clean and supports healthy stem uptake, significantly extending vase life.
How do professional flower growers test flower longevity?
At British Flowers Direct, flowers are monitored in studio and office vases to observe how they open and how long each variety lasts. Flowers are also sent to trusted home testers via letterbox-friendly mail order packaging, where they are treated exactly as a customer would — placed in clean water in a clean vase — giving real-world data on vase life and consumer experience.
Is flower transit gel safe and environmentally friendly?
Yes. The transit gel used by British Flowers Direct is non-toxic, made from planet-friendly components, and contains no single-use plastics. It can be washed down the sink, added to household waste, or composted. It is not a polyacrylamide gel — it uses rheology modifiers to release water gently.
Shop Flower Care Products at British Flowers Direct
Ready to give your blooms the professional treatment they deserve? Whether you are a budding florist or just want your weekly bouquet to last longer, we have the tools you need.
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Order Our Transit Gel: Perfect for transporting your own bouquets or ensuring garden-cut flowers stay fresh on a journey.
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Browse Chrysal Products: From CVBN tablets to universal flower food, get the professional's secret to longevity.
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Eco-Fresh Wraps: The perfect pairing for hydration gel to keep your stems supported and moist.
By understanding the science of cut flower care, you aren't just buying flowers, you’re investing in a week (or more!) of natural beauty.