Scissors or Knife? What You Should Really Cut Flowers With
The honest answer to an old debate — when the knife wins, when scissors are fine, and why kitchen scissors are almost always the worst choice.
“Use a knife, never scissors” — you hear it in every florist's workshop. Is it actually true, or just trade folklore? The short answer: there is a lot to it, but the truth is more nuanced than a blanket ban. Here is what really matters about the tool — and which solution makes the most sense for your kitchen at home.
What this is really about: the vessels. A flower stem isn't a solid rod but a bundle of fine tubes — the vessels that pull water up into the bloom. When flowers die early, it's almost always because these channels are blocked or crushed. That's exactly where the tool matters: it isn't about “cutting off,” it's about leaving the tubes open and undamaged.
The problem with scissors. Scissors work with two blades pressing the stem from both sides. On thin, soft stems that cuts cleanly. On thicker or woody stems, though, the scissors crush the outer vessels before the blade is all the way through. The result: a flattened stem end that draws water far less well. Florists see it daily — bouquets with crushed stems turn the vase water cloudy faster.
Why the knife wins. A sharp knife severs the stem in a single drawing cut, with no counter-pressure from the other side. The vessels stay round and open, the cut end is smooth. There's a practical bonus too: with a knife you almost automatically cut at an angle, and an angled cut increases the uptake surface and stops the stem from sitting flat on the vase bottom. That's why pros reach for the florist's knife — not out of tradition, but because it gives the best result.
The honest caveat. A knife is only better if it's sharp and you can handle it. A dull knife tears more than it cuts, and for untrained hands a drawing cut on a thin stem is slippery and not without risk. A good, sharp pair of florist scissors (a real one, not a kitchen model) is perfectly adequate for most stems at home and the safer choice for many people. What you really should avoid is the ordinary household or kitchen scissors with their thick, often dull blades — those crush the most.
How to cut correctly — step by step. 1. Keep the tool clean: wipe the blade before cutting, otherwise you transfer bacteria straight into the fresh stem. 2. Cut at an angle, roughly 45 degrees. 3. Pull through in one stroke, don't “saw” repeatedly. 4. If possible, cut under running water or right before placing in the vase, so no air gets drawn into the vessels. 5. Trim a fresh piece every two to three days — that reopens the clogged channels.
Special case: woody and hollow stems. For hard, woody stems — like lilac or hydrangea — a knife is almost mandatory, because scissors crush them most easily here. The old tip to smash or cross-cut woody stems has actually been debunked in practice: a clean angled cut draws water more reliably without destroying the tissue. Hollow stems like delphinium only need a smooth cut anyway — and that's exactly where the knife shines.
The bottom line in one sentence. If you want it done precisely and you're confident with a blade, cut with a sharp knife — especially on thick and woody stems. For everyday use at home, a real, sharp pair of florist scissors is a good compromise. Only one thing stays banned: the dull kitchen scissors. With us the bouquets reach you already freshly cut — but the final cut before the vase is yours to make.
Frequently asked
- Can I really not cut flowers with scissors?
- You can — with a real, sharp pair of florist scissors it's perfectly fine for thin and medium stems. The trouble is only with dull kitchen or household scissors that crush the stem instead of cutting it cleanly. For thick or woody stems a sharp knife is still the better choice.
- Why does the vase water turn cloudy faster with crushed stems?
- A crushed stem end has more torn, destroyed tissue. That plant matter is ideal food for bacteria, which multiply in the water and turn it cloudy. A smooth knife cut leaves less surface to colonise and keeps the water clear longer.
- Do I really have to cut at an angle?
- It's worth it. An angled cut increases the cut surface and stops the stem from sitting flat on the vase bottom and blocking water uptake. The effect isn't huge, but it costs nothing — and with a knife the angled cut happens almost by itself.
- Should I clean my cutting tool between flowers?
- Yes, a quick wipe is often enough. A used blade carries bacteria and plant sap that you'd otherwise transfer straight into the next fresh cut. Cleaning the blade or scissors now and then with a little dish soap or alcohol keeps the water cleaner for longer.