i don't think there is any age limit. i get my approved adsense account within one day. I did it through an ebook. if you want to know PM me
Try to put quality and unique content that is not available over the internet. It should be useful and authentic with good sentence structure and vocabulary. Post 20 Articles of high quality don't spam and apply for adsense
ok I will apply for new adsnse account in the next few months.\ I will little improve my website in few days.
I dont think there is any age limit for applying for Google Adsense . However, you should make sure your website which is really quality content and good design before you apply for Google Adsense. In addition, your website should be indexed as well. Good luck to you.
I think there have no time limit. Most important thing is content. Good quality unique and error free article is the key to approval of Adsense application. I think you need not to have a new account. It is against to Adsense policy. With your one account you will be able to show ads to your all websites.