Scavenging FTW! The office building here is remodeling their entire facade, which includes tearing out the various bits of landscaping, which they were offering free to whomever wanted to cart 'em off. So now we have a trunk full of free hastas — gotta love it when the universe hands you something you were resigned to paying for anyway.
Of course, the downside is that now we actually have to plant the damn things. ;P