I love my potted plants but I often wish that I could have flowers mixed with the greenery. Easy enough to do with outdoor potted plants, or those that can get sun indoors, and yes, there are some low-light flowering plants that do well indoors, but I have almost no sun and very little light indoors. I have enough for all those wonderful indoor plants like pothos and peace lilies, but for the most part, not enough for flowering plants.
I do, however, have a lot of beautiful flowers growing outside. Yes, they look great in vases, but I really wanted to have them integrated into those thriving, green plants. Well, I used to work for a florist, soooo....
I went to my local florist and asked if I could buy some of those little water tubes they use in arrangements to prolong the lives of cut flowers. They were happy to sell me as many as I wanted for about 10 cents each. They're available online too, but seem to be more expensive:
https://www.amazon.com/dp/B00W5RH7B6/
I inserted them into several planters leaving the top off, filled them with water and then inserted cut flowers.
Cut flowers can be thirsty so what is the most convenient way to keep these vials full? One is to use plastic syringes. You can get these at any pharmacy (no needles needed). In Massachusetts, they're required by law to give them to anyone who requests them at no charge (yes, I explained that I'm using them for flowers and offered to pay, but they refused). I don't know about other locations.
Another easy way is to use a small watering can that has a small-diameter spout. No worries if water spills out, it just goes into the potting medium.