Sandbox Limitation in Salesforce:
- You can refresh a full sandbox 29 days after you created or last refreshed it. If you delete a full sandbox, you must wait 29 days to replace it.
- You can refresh a configuration-only sandbox (including a developer sandbox) once per day.
- You may order up to a maximum of three full sandboxes.
- You may order up to a maximum of six configuration-only sandboxes.
- Enterprise Edition includes one developer sandbox.
- Unlimited Edition includes one full sandbox with the option to purchase up to three more full sandboxes.