cache_dir "/home/flowershopnet/public_html/var/cache" is not writable

#0 /home/flowershopnet/public_html/includes/src/Zend_Cache_Backend_File.php(181): Zend_Cache::throwException('cache_dir "/hom...')
#1 /home/flowershopnet/public_html/includes/src/Zend_Cache_Backend_File.php(129): Zend_Cache_Backend_File->setCacheDir('/home/flowersho...')
#2 /home/flowershopnet/public_html/includes/src/__default.php(62380): Zend_Cache_Backend_File->__construct(Array)
#3 /home/flowershopnet/public_html/includes/src/__default.php(62321): Zend_Cache::_makeBackend('File', Array, true, true)
#4 /home/flowershopnet/public_html/includes/src/Mage_Core_Model_Cache.php(137): Zend_Cache::factory('Varien_Cache_Co...', 'File', Array, Array, true, true, true)
#5 /home/flowershopnet/public_html/includes/src/__default.php(24184): Mage_Core_Model_Cache->__construct(Array)
#6 /home/flowershopnet/public_html/app/Mage.php(463): Mage_Core_Model_Config->getModelInstance('core/cache', Array)
#7 /home/flowershopnet/public_html/includes/src/__default.php(20855): Mage::getModel('core/cache', Array)
#8 /home/flowershopnet/public_html/includes/src/__default.php(20749): Mage_Core_Model_App->_initCache(Array)
#9 /home/flowershopnet/public_html/includes/src/__default.php(20791): Mage_Core_Model_App->baseInit(Array)
#10 /home/flowershopnet/public_html/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#11 /home/flowershopnet/public_html/index.php(89): Mage::run('', 'store')
#12 {main}