How Much Water Should Be in a Vase of Flowers
For most cut flowers, fill the vase about two-thirds full, or at least 8-10 cm (3-4 inches) deep, so every stem end sits well under the surface. Woody or thirsty stems such as roses, hydrangeas and lilac want deeper water, while tulips, daffodils, gerberas and other soft-stemmed flowers do better in just 5-7 cm. Whatever the depth, top it up daily, because a fresh bouquet can drink a surprising amount in its first 24 hours.
Water level sounds like a trivial detail, yet it is one of the first things we check when a customer tells us their flowers drooped on day two. Too little water and the stems dry out at the cut; too much and soft stems soften further, leaves rot below the waterline and bacteria multiply. Here is how we decide the right level for different flowers, and what else in the vase matters just as much.
The two-thirds rule and why it works
Cut flowers drink through the open vessels at the base of the stem. Once the cut end is exposed to air, even briefly, an air bubble can block those vessels and the head starts to wilt within hours. Filling a vase two-thirds full gives you a generous buffer: evaporation and drinking can lower the level by a centimetre or two overnight and the stems still stay submerged.
Depth also supports the bouquet. A tall arrangement standing in a centimetre of water is top-heavy, and the stems tend to lean on the rim, which bruises them. With a decent column of water and a vase roughly half to two-thirds the height of the bouquet, the stems sit upright and the flowers open evenly.
The rule is a starting point rather than a law. If you only remember one thing, make it this: no leaf should ever touch the water. Strip everything below the waterline before you fill the vase, whatever level you choose.
Deep water, shallow water: matching the level to the flower
Roses, chrysanthemums, eustoma, alstroemeria and most garden flowers are happy at the standard two-thirds level. Hydrangeas are the exception that proves how thirsty a bloom can be: they also take water through their petals, so give them the deepest vase you have and do not be shy about filling it nearly to the top. Woody stems such as lilac, viburnum or flowering branches belong in deep water too.
Bulb flowers are the opposite. Tulips, hyacinths, daffodils and amaryllis have soft, hollow stems that turn slimy if they stand in deep water for days. For these, 5-7 cm of cool water is enough; you simply need to top it up more often. Gerberas and calla lilies also prefer a shallow level, since their stems rot quickly where they sit in water.
Mixed bouquets are a compromise. If roses share a vase with tulips, aim for about 8-10 cm and check it every morning. When the mix is very uneven, it can be worth splitting it into two vases, which is also a good solution if you have daffodils in the bunch; we explain why in our piece on flowers that should never share a vase.
Bouquets we can deliver
Temperature and quality of the water
Room-temperature or slightly cool water suits nearly every bouquet. Very cold water slows the uptake of stems that have just travelled, while lukewarm water, around 35-40 degrees Celsius, can help revive roses that arrived a little limp; give them an hour in it and then let it cool naturally. Bulb flowers are the exception again: keep their water cool, as warmth makes tulips open and stretch too fast.
Clean tap water is fine. If yours is very hard or heavily chlorinated, let it stand for an hour or use filtered water. The flower food sachet that comes with a bouquet is worth using: it feeds the flowers and slows bacteria. Dissolve it in the amount of water stated on the packet, because a sachet meant for a litre poured into a small amount of water is too strong.
The vase itself matters as much as the water. Wash it with hot water and a drop of detergent before use; a thin film left from the previous bouquet is enough to cloud fresh water within a day.
Top-ups and water changes over the week
For the first two days, look at the level morning and evening. A fresh bouquet of roses or hydrangeas can drink a third of a vase overnight, and that is exactly when the level drops below the stems without anyone noticing. Top up with fresh water of the same temperature.
Every two days, change the water completely rather than only topping it up. Take the bouquet out, rinse the vase, refill it to the right level, and trim 1-2 cm off each stem at an angle with a sharp knife or secateurs. Our schedule for changing vase water lays this out day by day if you like a routine.
Cloudy water, a sour smell or slimy stem ends are signs that bacteria have taken over. Do not just add more water to it: change it, cut the soft part off the stems and remove any wilted flowers, which release ethylene and age their neighbours faster.
Common mistakes with vase water
The most frequent one is a beautiful narrow vase that holds too little. Tall, slim vases look elegant, but a full bouquet of fifteen roses can empty them in a single night. If you love that shape, use it for a few stems and choose a wider vase for a generous bouquet.
The second is leaving the bouquet in its transport packaging. Some bouquets arrive with a small water reservoir or hydrated sponge at the base; that is meant for the journey, not for the week. Unwrap the bouquet, remove the binding if it is tight, trim the stems and put it into a proper vase with fresh water within an hour or two of delivery.
The third is placement. A vase on a sunny windowsill, next to a radiator or beside a fruit bowl loses water faster and ages the flowers quicker, however carefully you fill it. A cool spot out of direct sun and away from ripening fruit can add several days to a bouquet's life.
Sending flowers to someone in Russia
If you are sending a bouquet to family or friends in Russia, it helps to pass on these simple rules with the card: unwrap within a couple of hours, two-thirds of water for roses, a shallow vase for tulips, and a fresh change every two days. A card with your text is free, so a short care note fits easily beside your wishes.
We deliver across Russia; city delivery costs 500 RUB, and for remote districts and suburbs the operator confirms the price when confirming the order. In large cities you can choose express delivery in 1-2 hours after confirmation, a time window or an exact time, or pre-order up to 30 days ahead. Choose a bouquet in the catalogue, pay online by bank card, SBP or Yandex Pay, and if you want a photo of the bouquet before it leaves, ask a manager on WhatsApp. We deliver bouquets across Russia in 1–2 hours.
Frequently asked questions
How full should a vase of roses be?
Fill it about two-thirds full, so the stems stand in at least 8-10 cm of water. Roses drink a lot in the first day, so check the level in the evening and top it up.
How much water do tulips need in a vase?
Tulips prefer shallow, cool water, around 5-7 cm. Deep water makes their soft stems slimy, so top up little and often instead.
Can flowers have too much water in a vase?
Soft-stemmed flowers such as tulips, gerberas and calla lilies can rot if they stand in deep water. The bigger problem is leaves below the waterline, which decay and breed bacteria.
How often should I add water to a vase of flowers?
Check daily and top up as needed, especially during the first two days. Change the water completely every two days and trim the stems at the same time.
Should I use cold or warm water for cut flowers?
Room-temperature water suits most flowers. Slightly warm water can revive limp roses, while tulips and other bulb flowers last longer in cool water.
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