Raiding the branches of street trees has become my favourite way of decorating the house with flowers. Though a "cutting garden" would be ideal, our garden is just too new and up to this stage the practical side has won out over the ornamental. For the cost of nothing except a little time there are fresh flowers for almost every room of the house.
I gathered these crab apple and elm (thanks to your helpful comments) blossoms on a recent walk. Perhaps its best not to mention that I almost crossed paths with a brown snake on the road. Thank goodness for the local farmer who spotted it before I did. I was in day-dreamy collecting flowers mode.
Many of my branches were only budding when picked, but if you change the water daily or every second day you should be rewarded with a full branch of blossoms. In the last picture you can see several days later that the buds have opened. I won't be winning any flower arranging prizes, but it is so uplifting to have flowers in the house.