How quickly is miracle grow absorbed. Due to neglect, my containered cherry tomatoes were greatly in need of water and fertilizer. I gave them the proper dosage, and 12 hours later we had a heavy rain come through.
A stump grinder uses a spinning blade fitted with carbide tipped teeth that scrape away at the stump. Bear in mind that a stump grinder can only work to a limited depth, normally up to 10-12 inches. If you feel up to it, stump grinders can be hired by the day at most local hire shops. If you decide to use a contractor to do the work for you, expect to pay a minimum of around Â£65 plus VAT for the smallest of stumps.
If you have time, start the holes one day, fill them with water and come back to remove the much softened soil the next day. Measure and mark the location of each fence post. Post hole diggers have a maximum effective depth of about 3/4 of their handle length, so a five foot pair will dig about 3 1/2 half deep. Very hard earth like clay is extremely difficult to dig with a manual pair of post hole diggers.