Is there any limitation on how long the site can be in google sandbox? I have ione site that is in sandbox since february this year-that is six months now.
We can't say the time duration, Once your site is in sand box it will be monitored after confirmation of your site is not spam your site will be released from the sandbox.
actually it depends on the time of crawling of your site. Google Sand box a site by crawling it and it will be OK if your site is OK until the next crawl. thanks
First things first, there is nothing called sandbox... Its existence is just a myth. If you think your website is not getting indexed from past 6 months you should have tried to find out the reason. You have wasted your time by sitting idle in a hope of getting out of sandbox itself. Try to get your webpages indexed by submitting your Sitemap to Google and by getting backlinks from popular websites which frequently get crawled.
No one can't say exact time, But we can release again from sand box within 120 days (as per google saying but taking less time)
Try this: Go to Google Trends and start writing content for rare terms (where there's little content). Ping them, tweet, etc. Do this for one or two weeks. Good Luck.