The one thing that contradicts with this is that SEOmoz report cards keep stating that our anchor text on links is considered cannibalization. How do we "modify our anchor text" without using "raised beds" or "raised garden beds" and risk this issue of cannibaliation?
"buy a raised bed", "raised garden beds", "Composite Timber Raised Beds", "Cedar Raised Beds", "Farmstead Raised Beds", "Cedar rectangular raised beds", "raised beds and supplies", and "Complete Raised Garden Bed Kits"
Explanation
It's a best practice in SEO to target each keyword with a single page on your site (sometimes two if you've already achieved high rankings and are seeking a second, indented listing). To prevent engines from potentially seeing a signal that this page is not the intended ranking target and creating additional competition for your page, we suggest staying away from linking internally to another page with the target keyword(s) as the exact anchor text. Note that using modified versions is just fine (for example, if this page targeted the word 'elephants', using 'baby elephants' in anchor text would be just fine).
Recommendation
Unless there is intent to rank multiple pages for the target keyword, it may be wise to modify the anchor text of this link so it is not an exact match