However, on highly alkaline soils even some Iowa native plants grow poorly.
These include pin oak, river birch, and white pine.
The standard measurement of alkalinity and acidity is known as p H. A p H of 7 is neutral, which is neither acid nor alkaline. A p H of 5.5 is 10 times more acidic than a p H of 6.5.
Conversely, a p H of 8.5 is 10 times more alkaline than a p H of 7.5. The soil p H is important because it affects the availability of nutrients in the soil.
But before attempting to raise or lower your soil's p H, you should first conduct a soil test to determine your current soil p H.
Consequently, most horticultural plants grow best in soils with a p H between 6 (slightly acid) and 7.5 (slightly alkaline). If your soil is not, then you will need to make a choice.Either choose plants adapted to your soil's p H or alter your soil's p H to fit the plants.