Most ranking drops after a cannabis replatform trace back to two things: a redirect map that missed old URLs, and category or product pages that came over thinner than before. Fix the 301s first, rebuild the content the templates dropped, then watch Google Search Console recover the pages one section at a time.
Why the migration cost you rankings
When a store moves platforms, every old URL either points somewhere useful or it does not. A redirect map that covers the homepage and top sellers but skips old blog posts and discontinued-product URLs throws away the authority those pages earned. The other common cause is thinner templates — a WooCommerce category page that used to carry 300 words of intro copy and FAQ markup can come across as a bare product grid, and Google notices the drop in substance.
A worked example: a seed bank moved off Shopify after the platform's THC policy forced it out, landing on WooCommerce over a weekend. Rankings fell about 40% the following week. The cause was not the move itself. The old URLs used /collections/autoflower-seeds and the new ones used /product-category/autoflower/, and no redirects connected them. One 1:1 map fixed most of it.
Preserve URL structure, then map 1:1
The lowest-risk migration keeps the old URL structure intact on the new platform so few redirects are needed at all. When the structure has to change, build a 1:1 redirect map: every old URL gets a single 301 to its closest new equivalent, not a blanket redirect to the homepage. Crawl the old site first so you have the full URL list, including the long tail of posts and out-of-stock products that still pull traffic.
Rebuild what the templates dropped
Compare a handful of old pages against their new versions side by side. Category intro copy, buying-guide sections, internal links, germination-guarantee blurbs, and structured data are the usual casualties. Whatever earned rankings on the old page needs to exist on the new one. This is slow work, but it is where most of the recovery beyond redirects comes from.
Fix the technical basics
Check that the new platform is not blocking crawlers in robots.txt, that canonicals point to the right URLs, that the XML sitemap lists the new URLs, and that page speed did not crater. A fresh WooCommerce install with a heavy theme can add seconds to load time, and that alone can suppress rankings.
Monitor recovery in Search Console
Watch the Pages report and the Performance report in Google Search Console. Expect temporary volatility for a few weeks; that is normal while Google reprocesses the site. Track which sections recover and which stall, and treat stalled sections as a signal that a redirect or a piece of content is still missing there.
Do not stack changes
The single biggest avoidable mistake is redesigning and migrating at the same time. If rankings drop, you will not know whether the platform, the new design, the new URLs, or the new content caused it. Migrate first on a 1:1 basis, confirm rankings hold, then redesign as a separate project.
Key takeaways
- Build a 1:1 redirect map covering every old URL, not just the top pages, and prefer keeping the URL structure unchanged.
- Thinner templates are the second big cause; rebuild the intro copy, internal links, and schema the migration dropped.
- Monitor the GSC Pages and Performance reports and expect a few weeks of temporary volatility.
- Never redesign and replatform at once, so you can tell what caused any drop.
- The Shopify-to-WooCommerce move is common in cannabis after Shopify's THC restrictions; plan the redirects before you cut over.
Frequently asked questions
How long does recovery take after a cannabis replatform?
Usually a few weeks to a couple of months, depending on how fast you fix the redirect and content gaps and how often Google recrawls the site. The Pages report in Search Console shows sections coming back in stages rather than all at once.
Why did rankings drop when I moved from Shopify to WooCommerce?
The most likely cause is that the URL structure changed and old URLs were not redirected 1:1 to the new ones. The second is category and product pages coming over thinner than the originals. Both are fixable without undoing the move.
Should I migrate and redesign at the same time?
No. Do the migration on a 1:1 basis first and confirm rankings hold, then redesign separately. Stacking both changes makes it impossible to tell what caused a drop if one happens.
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