The model uses the Hair and Fur modifier.
All required settings in the archive are presented as screenshots
3 layers of modifier, in General Parameters - Density - each layer has its own pile map, you need to place the map in the mat.editor and drag it to the empty square to the right of the specified item
tulip_01_white.png - white color
tulip_02_buton.png - bud color
tulip_03_stebel.png - stems and leaves

and also, set the color in Material Parameters - Tip Color / Root color for each layer, taking the color with a pipette or adjusting it yourself