Water with sugar content can and will provide roses with vital nutrients that will help them bloom beautifully. However, it should be noted that too much of anything is never a good thing. As the saying goes, moderation is key.
The sugar in the water is an excellent source of carbohydrates for the rose bushes, as it provides the energy that they need to grow and thrive. It also helps promote root growth by feeding the microbes living in the soil around the roots. The sugar enables these microbes to break down soil nutrients into a form that the plant can absorb more easily.
When making your sugar water mix, make sure not to use too much sugar, as overfeeding may lead to rapid bacterial growth, which might harm your plants. It’s best practice to add one teaspoon of white granulated sugar to a full gallon of warm water until it dissolves completely before giving it to your roses.
Apart from adding sugar directly to water, you could also create a sweet syrup for your plants using other natural sweeteners rather than white refined cane sugar. Honey, fruit juice, or molasses are some healthier alternatives that help infuse minerals and extra microorganisms necessary for healthy plant growth.
Then again, when used in excess quantities or frequency, this substance invites fungal and bacterial diseases while weakening the overall health of your plant. So be careful when trying new things out. Stick to what has been tried, tested & proven over time in smaller doses first!