Your Tap Is on the Team: A Workroom Water Audit for UK Florists

Water is the quietest input in a florist’s workroom. It arrives through the tap, fills the bucket, and gets blamed for very little — until stems go soft, leaves yellow, or a bouquet that looked sharp on Friday looks tired by Monday. In a UK shop, the water coming out of the tap is not the same in Cornwall as it is in Cambridgeshire. It can even change through the year. A short, sensible audit now will tell you more about your conditioning routine than another round of guessing.

Start with the paperwork you already pay for

Every UK water company publishes a water quality report for its supply area. Find yours, check the stated hardness, pH range and any notes on chlorine or chloramine. This is not a lab result for your exact tap, but it is a useful starting point. If you are in a hard-water area — much of the South East, East Anglia and parts of the Midlands — expect more mineral content and a greater buffering effect. Soft-water areas in the North West, Wales and parts of Scotland often see lower hardness, but that does not automatically mean better workroom water.

Make a note of your supplier’s figures in your workroom file. If you move premises or your supplier changes its treatment, you have something to compare against.

The five-minute bench check

You do not need a laboratory. You need a clean glass, your nose, a couple of test strips and a little consistency.

Run the cold tap for about thirty seconds, then fill a clear glass. Look at it against a white surface. Is it cloudy? Does it clear from the bottom up? That can suggest sediment or air. Smell it. A strong swimming-pool note points to chlorine; a earthy or stale note may mean the supply or your internal pipework needs attention.

Use pH strips and hardness strips according to their instructions. Dip, wait the stated time, and record the result. Then fill a bucket as you normally would, leave it overnight, and test again. The difference between fresh tap water and water that has stood in the workroom can be revealing. If the pH has drifted, or the bucket has a film or smell, your storage and cleaning routine is part of the story.

Keep the results simple: date, pH, hardness reading, smell, sediment, and any notes. A sheet on a clipboard is enough. The point is not perfect numbers. The point is spotting change.

What pH and hardness are doing to your stems

Most cut flowers condition best in a slightly acidic solution, and commercial flower foods are usually designed to bring the water into that range. If your tap water is naturally alkaline, it can resist that shift. The flower food has to work harder, and the dose on the sachet may not deliver the same result as it would in softer water. Hard water also brings minerals that can interact with flower food and leave deposits on stems and buckets.

Soft water is not a free pass. It can be low in buffering minerals, which makes pH less stable once stems and bacteria start changing the water. Rainwater is even softer and may carry microbes if it has been stored warm and open. The answer is not to chase a single ideal number. It is to know what you have, choose a flower food that suits it, and keep the bucket clean.

Low-cost fixes before fancy kit

Do not jump straight to a reverse-osmosis system. Start with the cheap variables. Run the tap before filling buckets, especially first thing in the morning. Use cold water unless your flower food instructions say otherwise. Clean buckets with a proper brush and let them dry upside down. If you have a sediment filter on the workroom tap, change it on schedule rather than when it looks grim.

For chlorine, a simple carbon block filter can help, but check whether your supplier uses chloramine. Standard carbon is less effective against chloramine, and a catalytic carbon filter may be the better choice. If you are unsure, ask the filter supplier for a water report match rather than guessing from the packaging.

If hardness is your main issue, look at flower food formulated for hard water before adding anything else. Do not tip in acid or home-made remedies without checking with the manufacturer. Flower food is a balanced product; changing the water chemistry blind can make things worse.

Rainwater harvesting is worth considering for conditioning and general workroom use, but treat it as a managed supply. Use a covered butt, a leaf filter, and a dark or opaque container. Label it clearly, use it within a few days, and keep it out of drinking-water taps. If it smells or looks cloudy, do not put stems in it. In a busy shop, rainwater works best as a supplementary source, not a replacement for a clean mains supply you understand.

Dosing is part of the audit

Once you know your water, check your dosing. Flower food is not a case where more is better. Over-dosing wastes product and can leave residue; under-dosing gives bacteria an easier ride. Measure water by volume rather than eyeballing the bucket, and follow the label for the correct ratio. If you use a concentrate, keep a dedicated measuring jug and clean it properly. If you switch between hard and soft water — perhaps because you are using rainwater — note which food and dose you used on the batch card.

A simple water routine for 2026

Test tap water once a month and after any supply change. Test stored rainwater weekly in warm weather. Clean and dry buckets between uses, and do not let water sit in them overnight unless it is a deliberate conditioning batch. Check filters monthly and replace them according to the manufacturer’s schedule, not the panic schedule. Keep a small log. When a delivery of roses or lilies performs badly, you will have something to compare beyond memory.

At Eco Flower Supplies, we see plenty of workrooms trying to solve water problems with more products. Often the better answer is a cleaner bucket, a sensible filter, the right flower food for the local water, and a habit of writing down what changed. Your tap is part of the team. Give it a quick appraisal, and your stems will have a fairer start.