that is pretty damned hot dirt ya got there and it'd be best to lose it. don't clean the roots tho...keep the rootball in one piece as much as possible and place it in a new container with your new soil and hope for the best. i'd be planting more seeds tho just in case...

after getting your new pot ready for the plant, add a cup or so of your super-thrive solution to the bottom of the hole, place the plant into the hole then cover with more new soil...then pour a couple more cups of your super-thrive solution and all should be well...if the plant survives that 13 ph soil that is...