Retro poster prompt

Design a finished poster in portrait format. Headline: "Wildflower Fest". Subtitle: "Three days of folk and indie". Include these details as legible text: August 8–10 · Meadow Park Visual style: Retro. Colors: Mustard, rust and cream. Visual direction: Hand-drawn wildflowers growing out of an acoustic guitar Clear typographic hierarchy. Spell all text exactly as given and add no other text. The poster fills the whole image edge to edge: no mockup, frame, wall or surrounding scene.