Just finished this painting in watercolor with many, many layers in order to achieve high saturation! I used Holbein watercolor paints and arches 300lbs cold pressed paper.
For the stems and leaves, I used leaf green, sap green, and neutral tint watercolors. For the tulips, I used Isoindolinone Yellow Deep, Scarlet Lake, and Pyrrole Red.
I used Princeton brushes mostly. My favorite is the black velvet series. They are a combination of natural and synthetic fibers. They hold a lot of water and have a soft snap to them.
Aqua Elite Brushes pack: https://amzn.to/3pMaypx
Neptune Watercolor Brush pack: https://amzn.to/349qycR
Princeton Black Velvet series brushes: https://amzn.to/33MzDbk
Arches 140 cold-pressed: 9x12 https://amzn.to/3z0dhP3
Holbein Watercolor Kits:
12 5 ml tubes: https://amzn.to/3Frc31L
18 5 ml tubes: https://amzn.to/3qlUY32
24 5 ml tubes: https://amzn.to/3Eqfy7t