
How to Neutralize Pine Needle Acid in Soil
- The Myth of Acidic Pine Needles. Pine needles are acidic when they drop from the tree. ...
- Pine Needles and Composting. Decomposition neutralizes pine needle acid naturally. ...
- Acidic Soil Plants. Successful plantings under pine trees incorporate shade- and acid-loving plant species suited for your hardiness zone.
Full Answer
How do you neutralize acidic soil for pine trees?
Neutralizing acidic soil involves adding a substance that has a basic pH above 7.0. Before attempting to change soil pH, have the soil tested to determine if a pH change actually is necessary. Most pine trees need a slightly acidic soil to grow.
Are pine needles acidic when they drop off the tree?
By the time pine needles gets old and are ready to drop off the tree they are barely acidic. After a few days on the ground, they lose their acidity completely.
How do I get rid of pine needles in my lawn?
One is the shade; the other is the extra acidity from pine needles that drop onto the soil and decompose. Grass grows poorly in acidic soil, so you'll have to neutralize the soil under your pine trees. This is easily accomplished by adding an alkaline soil amendment. Rake all needles, bark and any wood chips from around your tree, using the rake.
Should I use pine needles as fertilizer?
BTW, plants need organic matter, not fertilizer. The more organic matter your have, the better the soil environment for any plant (and microorganisms) to grow. Decaying pine needles provide good organic matter that will certainly benefit any plant regardless of its pH.

Will lime neutralize pine needles?
Neutralize Pine Needle Acid In Soil Purchase a pH-raising material. Hydrated lime will have a rapid effect on pH without the added nitrogen.
How do you dry pine needles to keep them green?
Dry the needles in the sun on a large towel or other cloth if you're going for a bleached look. If you want the needles to retain their color, dry them in the shade on a large cloth. This process may take a while, so check the needles every day until they're as dry as the dead needles that have fallen from the tree.
What do you put in soil under pine trees?
A nitrogen-rich, slow-release fertilizer dug in at the same time or scattered over the soil and watered in provides sufficient nitrogen for your plants plus the decomposing pine needles. Pine trees grow where the soil and weather are suitable; they don't change their environment.
What neutralizes acid in soil?
limestoneThe most common way to raise the pH of soil is to add pulverized limestone to the soil. Limestone acts as a soil acid neutralizer and consists of either calcium and magnesium carbonate or calcium carbonate. These are called dolomitic limestone and calcitic limestone respectively.
Can you bleach pine needles?
Lay them with the sheath ends in one direction. Wash them in warm water with laundry soap and a couple tablespoons of bleach. If the needles have a little mold on them, the bleach will remove it. Lay the needles in a flat shallow box and put them to dry in a warm room.
Is there a way to preserve pine needles?
Leave the evergreen branches on the nail to dry for three weeks. Take the bunches down and spray the branches and needles with hairspray. The hairspray provides a protective coating for the foliage and helps keep the parts intact.
Should you leave pine needles under tree?
Pine needles break down slowly and can be used as a mulch but also to line paths and don't need replacing as often as other organic amendments. Leave some of the needles as a bed around the tree roots to help nourish the trees and prevent moisture loss and excessive weeds.
How long does it take for pine needles to decompose naturally?
The pine needles composting process usually takes not more than 4 months to breakdown for all the dead pine needles waste. During the first weeks of starting the compost, organic matters that are usually decomposed first are greens, then eventually pine needles. What is this?
Will lime hurt pine trees?
Pines need a pH between 5.0 to 6.5. So, if you start adding lime to make the soil less acidic, you risk your trees having an inability to absorb nutrients (nutrient deficiency), and potentially die.
What do you do if your soil is too acidic?
Soil acidity can be corrected easily by liming the soil, or adding basic materials to neutralize the acid present. The most commonly used liming material is agricultural limestone, the most economical and relatively easy to manage source. The limestone is not very water-soluble, making it easy to handle.
How can I make my soil less acidic naturally?
To make soils less acidic, the common practice is to apply a material that contains some form of lime. Ground agricultural limestone is most frequently used. The finer the limestone particles, the more rapidly it becomes effective. Different soils will require a different amount of lime to adjust the soil pH value.
How do you reduce acidity in soil naturally?
Adding peat moss to your garden soil can also help to lower the pH of your soil gradually. Peat moss is an excellent soil amendment for acid-loving plants and is easy to incorporate into the soil. Simply add two to three inches to the top of the soil and work it into the layers of topsoil underneath.
How to neutralize pine tree soil?
Grass grows poorly in acidic soil, so you'll have to neutralize the soil under your pine trees. This is easily accomplished by adding an alkaline soil amendment. Rake all needles, bark and any wood chips from around your tree, using the rake. Needles and wood add acid to the soil under the tree. Run an aerator under the tree.
Why does my pine tree stop growing?
One is the shade; the other is the extra acidity from pine needles that drop onto the soil and decompose. Grass grows poorly in acidic soil, so you'll have to neutralize the soil under your pine trees.
Why do pine trees get acidic?
Sprinkler. Pine trees can cause the soil beneath them to become acidic through the action of natural mulch decomposing. Image Credit: Jupiterimages/Photos.com/Getty Images. As pine trees age, they deposit bark and pine needles over their soil around the base of the tree. Over time, this soil can build up into a thick layer.
How to raise pH in soil?
Contact your local county extension service to find out where to submit a soil sample, and the preferred method of testing the soil. A soil test will tell you what amendments to add to the soil to raise the pH . Typically lime is recommended to raise the pH of soil.
Can pine trees grow in acidic soil?
Fortunately, neutralizing soil under a pine tree is not complicated.
How to Clean Up Pine Needles
Even though evergreen trees are beautiful, cleaning up pine needles can be a hassle. The wind won’t carry them all away, and they’ll quickly multiply if you don’t do anything. There are many different ways to clean up pine needles, so knowing what will work best for your situation is important.
Creative Ways to Use Pine Needles
Even though this article showed you how to remove pine needles, it doesn’t mean that all of your work was for nothing. Pine needles can actually have other purposes once they fall to the ground.
Final Thoughts
Removing pine needles can be work, but it is definitely possible. Rakes, brooms, vacuum cleaners, leaf blowers, power washers, or even duct tape can be used to remove them, depending on the size of your lawn and the terrain.
Frequently Asked Questions About Best Way to Clean Up Pine Needles
Pine needles can make good mulch for gardens, but they are high acidity. This can harm plants and grasses. To prevent dead grass and plants, clean up pine needles once a year.
How to make soil more alkaline?
Let’s say your soil is more alkaline than your plants want. The solution seems obvious – add something that is acidic. When you add acid to soil it should reduce the pH making it more acidic. Anyone who has taken basic chemistry in school has probably seen this take place in a test tube.
How long does it take for acidic rain to change soil pH?
As the acidic rain hits the ground, it neutralizes (dissolves) a bit of limestone, but the amount is extremely small. It will take another billion or so years before it changes the soil pH. I have used Ontario as an example, because I know it best. The same principle applies to most soils.
What is the pH of soil?
Most plants prefer a value of around 6.8. Most plants will grow just find with a pH in the range of 6.4 to 7.5.
Do pine needles acidify soil?
Since pine needles are acidic they will acidify your soil. This advice is very prevalent especially for growing acid loving plants such as azaleas and rhododendrons.
Can pine needles rot away?
This is an old gardening myth that just won’t rot away! This common, incorrect, advice goes as follows: if your soil is alkaline (ie has a pH above 7) and you want to make it more acidic, add pine needles to the soil. Since pine needles are acidic they will acidify your soil. This advice is very prevalent especially for growing acid loving plants ...
Do pine needles lose their acidity?
After a few days on the ground, they lose their acidity completely. The brown pine needles, also called pine straw, are not acidic. There are two important points here. Since your source for pine needles is probably not green, they are NOT acidic. Collecting old pine needles is pointless if you are trying to acidify your soil.
Why are pine needles good for gardening?
Besides the cost savings, there are several reasons pine needles are a good choice. They are lightweight. There’s enough heavy lifting in gardening. Not only are they easier on the back, but they also won’t compact your soil.
How to keep pine straw from decomposing?
Because it is slow to decompose, you will probably only need to top it off with a couple of inches or so each spring. Shake and toss pine straw, the way you would regular straw so that it forms a fluffy layer. It will eventually settle and stay in place, despite rain or wind.
What is pine straw?
Pine straw is the name given to pine needles when they are used as mulch. Pine straw and pine needles are the same. Commercially sold pine straw is either a long needle or short needle. Long needle pine straw is from the Southern Yellow pine tree. The needles are an impressive 12 to 18 inches.
Why are Southern Yellow pines making a comeback?
However Southern Yellow is making a comeback, probably because of the market for pine straw, so long needle mulches are once again becoming more available.
How long is a needle mulch?
The needles are an impressive 12 to 18 inches. Long and an attractive coppery color when dry, they make a gorgeous mulch and are extremely slow to decompose. You also need less long needle mulch to cover a large area. It costs more per bale, but since you are using less, it generally costs about the same or less to do a job, than short needle mulch.
Is pine straw safe for slopes?
Pine straw is often recommended for slopes and hillsides, because it allows water to get through to the soil and the pine needles help keep it there, rather than washing to the bottom of the slope and taking the topsoil with it. Of course, this is not fail-safe.
Do pine needles lower pH?
Pine needles do not lower the pH and acidify the soil. Many things influence soil pH, including climate and rainfall. However mulching materials are not worked into the soil, so whatever effects they may have remains at the surface and do not alter the soil around plant roots. Featured Video.
