Apache subfolder route not working with zf2 - wordpress

Question

I have one zf2 application and one wordpress blog, both are different directories. (/var/www/zf2 , /var/www/blog). I want that my route example.com should point to my zf2 application and example.com/blog should point to my wordpress blog. I am using apache alias feature and it is working only for main route. example.com/blog is pointing to my wordpress blog but any other route of blog is pointing to zf2 application. Like example.com/blog/aboutus is pointing to my zf2 application and showing zf2 not found error page instead it should point to my blog page.
<VirtualHost *:80>
ServerName example.com
DocumentRoot /var/www/zf2/public
Alias /blog/ /var/www/blog/
<Directory /var/www/blog>
DirectoryIndex index.php
Options Indexes MultiViews FollowSymLinks
AllowOverride All
Order deny,allow
Deny from all
#Allow from all
</Directory>
<Directory /var/www/zf2/public>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
Order allow,deny
allow from all
</Directory>
</VirtualHost>
Please find below , htaccess content of my zf2 application.
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)/$ /$1 [L,R=301]
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [NC,L]
RewriteCond %{REQUEST_URI}::$1 ^(/.+)(.+)::\2$
RewriteRule ^(.*) - [E=BASE:%1]
RewriteRule ^(.*)$ %{ENV:BASE}index.php [NC,L]
And these are my blog htaccess configuration.
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress