Why is SiteGround slow on busy days?

SiteGround entry plans limit PHP workers — when too many visitors arrive simultaneously, new requests queue behind active ones. Each visitor triggers a new PHP process; with limited workers, TTFB spikes from 200ms to 1000ms+ during peaks.

Can I use W3 Total Cache or WP Rocket on SiteGround?

You can install them, but SiteGround recommends using SG Optimizer exclusively because it integrates with their server-level Nginx cache. Running two caching systems simultaneously causes conflicts — typically resulting in stale pages, white screens after updates, or cache bypass failures.

Is SiteGround fast for WordPress?

SiteGround is faster than most shared hosts with average TTFB around 300–500ms on lower-traffic sites. It's a solid choice for small sites, but PHP worker limits and renewal pricing ($25–40/mo after year 1) make it less competitive for growing sites.

Why does SiteGround renewal cost so much more?

SiteGround's intro pricing ($3.99/mo) renews at $14.99–25.99/mo — a 4–6× increase. This pricing model is intentional. After the first year, many users find better value elsewhere for the same or better performance.

All Fix Guides

Slow WordPress FixSiteGround

WordPress Running Slow on SiteGround? Here's Why.

SiteGround is faster than most shared hosts — but their caching configuration, PHP limits, and plan restrictions still trip up WordPress sites.

Intermittent slow loads during peak hours — fine at 2am, slow at noon

SG Optimizer caching conflicts causing stale content or white screens after updates

PHP workers exhausted message in error logs — requests queuing

WooCommerce checkout or login pages bypassing cache but still loading slowly

5 Fixes to Try on SiteGround

Ordered from quickest win to most involved. Try them in sequence.

Tune SG Optimizer — Don't Install a Second Cache Plugin

EasyHigh impact

SiteGround's SG Optimizer uses server-level (Nginx) caching. Installing W3 Total Cache or WP Super Cache on top creates cache conflicts. Disable any competing plugin. In SG Optimizer: enable Static Cache, Memcached, and Image Optimizer. Set cache expiry to 24 hours for static pages.

Upgrade PHP Workers (or Plan)

EasyHigh impact

SiteGround entry plans allow only 1–2 concurrent PHP workers. During traffic spikes, requests queue and TTFB spikes. Go to your cPanel → PHP Workers. If it's maxed out, you need to upgrade your plan. GrowBig and GoGeek plans include more workers.

Enable Cloudflare via SiteGround Dashboard

EasyMedium impact

SiteGround has built-in Cloudflare integration in the dashboard. Enable it and set Cloudflare to "Full" mode. This adds an edge CDN layer that serves cached pages globally, reducing load on SiteGround's PHP workers for repeat visitors.

Whitelist WooCommerce Cache Exceptions

MediumMedium impact

If running WooCommerce, make sure SG Optimizer is configured to bypass cache for cart, checkout, my-account, and any logged-in user pages. Incorrect cache exceptions cause session data to leak between users or force full page regeneration on dynamic pages.

Reduce External HTTP Requests

MediumMedium impact

Use Query Monitor to identify plugins making slow external API calls (social sharing, analytics, fonts). Each external call adds 50–200ms to server response. Replace Google Fonts with locally-hosted fonts (OMGF plugin) and switch analytics to a lightweight alternative if needed.

If none of these work…

If PHP worker exhaustion is frequent and upgrading plans doesn't help, SiteGround's infrastructure has a hard ceiling — their entry plans are not designed for high-concurrency WordPress sites.

The Infrastructure Fix

Some performance problems can't be fixed with plugins.

MevoHost runs NVMe SSD, LiteSpeed, PHP 8.3, Redis, and Cloudflare CDN on every plan — the stack that makes WordPress fast by default, not by accident.

Free Migration

We move your site from SiteGround — files, database, DNS.

NVMe SSD

3–5× faster storage than SATA SSD. Database queries are instant.

Redis Included

Object caching on every plan. No plugin configuration required.

See MevoHost Plans SiteGround vs MevoHost: Full Comparison

Ready to migrate? Free migration guide from SiteGround →