Can anyone tell me the perfect PH the soil should be for satsumas to produce its best.

Depends on the rootstock it's grafted to. Trifoliata like a lower PH than most other citrus.

I have leaned so much on citrus expectly satsumas. I have owri and brown select. Some are on the root stock " carrizo citringe " and some are on " Trifoliate orange" . As long as the PH is between 5-7 your ok. But most inportant is a time released fertlizer instead of just putting some 8-8-8 or 13-13-13 around them once in a while. Watering them a couple of times a week in the hottest of summers forcing them to grow a deep root system and a stronger tree. Over watering is a big don't because the tree gets lazy so to speak and the roots do not grow deep leaving a weak tree that needs to be babied and even rotting the roots or causing other problems like fungi.

David, a pH of 6.5 is an excellent pH for citrus. Lazz mentioned that Trifoliate could be a different pH, I don't know, as I have no information about that. However with 6.5 pH you can go wrong. Generally, over watering can "cause" problems, but only if the medium does not have good drainage, or has become compacted with age. Remember it is not the water that causes the problem, it is the lack of oxygen that causes the problem. In poor draining soils, or compacted soils, over watering displaces the oxygen, and due to the physical condition of these types of mediums,root zone oxygen is not quickly replaced. - thus a problem. In highly porous, fast draining soils, you can water all you want without causing damage to the tree. - Millet (624-)

In my area in south mississippi we have a rich but sandy soil that drains very well. Our PH is usually 5.5 and by adding fertizer with nitrogin can temp. lower the PH. I was thinking of adding some slag which will act like lime and bring the PH up a little. I'm like you, I would like my PH around 6.6 since in my area the soil is acidy anyway. I also have loads of rotten wood chips that were dumped in our field after Katrina. There were loads of ground up wood that was mainly pine but it is all mixed up with different types. I was thinking about putting this rotten wood mulch around my trees to rot down. I don't think it will hurt but help. Any ideas?