Doug Kanter wrote:

Another thought. Installing rain barrels and using soaker hoses would
increase your options a lot. My local Pepsi bottler gave me four 55
gallon HDPE (Food Safe) barrels for no charge and modifying them was
easy.

That's an interesting idea. What color were the barrels?

They were white. I used Krylon "Fusion" spray paint to make them match
the color of my brick foundation. It bonds to HDPE. Rustoleum also makes
a "Plastic Primer" that you are supposed to be able to use any of their
paints on top of.