diff --git a/docs/plans/host-migration-to-opentofu.md b/docs/plans/host-migration-to-opentofu.md
index 4a54292..7f537fc 100644
--- a/docs/plans/host-migration-to-opentofu.md
+++ b/docs/plans/host-migration-to-opentofu.md
@@ -154,6 +154,10 @@ For each stateful host, the procedure is:
 6. Verify Zigbee devices are still paired and communicating
 7. Decommission old VM
 
+**Note:** ha1 currently has 2 GB RAM, which is consistently tight. Average memory usage has
+climbed from ~57% (30-day avg) to ~70% currently, with a 30-day low of only 187 MB free.
+Consider increasing to 4 GB when reprovisioning to allow headroom for additional integrations.
+
 **Note:** ha1 is the highest-risk migration due to Zigbee device pairings. The Zigbee
 coordinator state in `/var/lib/zigbee2mqtt` should preserve pairings, but verify on a
 non-critical time window.