Garden growing wild

A volunteer sunflower has sprung up among the weeds in the back garden.

My spiral Stillman & Birn Beta sketchbook is almost full. I'm not as observant about paper quality as some sketchers, but the paint color does seem more intense than in any other sketchbook I've tried so far. I don't know if this is from a higher rag/cotton content, or what.

Ink and watercolor pencils.
Related reading: Weed Challenge Winners (James Gurney's weed challenge, along with Richard Bell's spring weed video, gave me the idea of drawing weeds.)