Soil pH is a critical factor for gardening success. Some plants thrive in neutral soil while other plants prefer soil on the acidic side. The difference lies in the plant’s ability to use nutrients present in the soil. For plants that prefer an acidic soil a critical nutrient is iron. Iron is most easily available in soil with a pH of around 5.5. Without iron, acid-loving plants will turn yellow and suffer stunted growth.

What is pH?

pH stands for “potential hydrogen ions” and is the measure of acidity or alkalinity. The pH scale ranges from 0 to 14. pH less than 7 indicates acidity, pH greater than 7 indicates alkalinity and 7 is neutral. Soil pH directly affects nutrient availability. Plants grown in soil with pH above or below their optimum range will be less vigorous, more susceptible to disease, less able to fight off insects and may even be weakened to the point of death.

How pH Affects Plants

Nutrients necessary for healthy plants are divided into three categories: primary nutrients, secondary nutrients and micronutrients. Primary nutrients are (N) nitrogen, (P) phosphorus and (K) potassium. These nutrients requited in the largest amounts for plant growth and health and are represented in numbers found on every fertilizer container (for example, 20-20-20). (Ca) Calcium, (Mg) magnesium and (S) sulfur are secondary nutrients that are also required by plants. These are required in lesser amounts than N-P-K but are also essential for good plant growth. (Zn) zinc and (Mn) manganese are examples of micronutrients. Micronutrients are required by plants in very small amounts. Most secondary and micronutrient deficiencies are easily corrected by keeping the soil at the optimum pH value.

Because pH directly affects nutrient availability, acid-loving plants develop iron chlorosis when grown in soils that are too alkaline. Iron chlorosis is often misdiagnosed as a nitrogen deficiency because both present with a yellowing leaf. Chlorosis of young leaves is the first symptom of iron deficiency, while a magnesium deficiency results in yellowing of older leaves first. Nitrogen-deficient plants will not only have yellow leaves but also weak stems, underdeveloped leaves and reduced root development.

What Causes Soil Acidity

Soil pH is influenced by the kind of parent material from which the soil was formed. Rainfall also affects pH. As water passes through soil it leaches basic nutrients such as calcium and magnesium from the soil, which are replaced with acidic elements such as aluminum and iron. For this reason, soils formed under high rainfall conditions are more acidic than those formed under dry conditions. Caused by pollution, acid rain also has an influence in soil pH. The application of fertilizers containing ammonium or urea speed up the rate at which acidity develops in the soil. The decomposition of organic matter will also add to soil acidity.

Testing and Adjusting Soil pH

Before planting any plant it is best to know the optimum pH range that plant will thrive in and the pH of the soil in which you will be planting. “The right plant in the right place” is always the best policy. Purchase a pH test kit or meter. These are available at most garden centers, or you may also send a soil sample to your county extension service. This will give you a more in-depth soil analysis along with the pH. To correct soil pH it is imperative that you know the soil pH before you attempt to change it.

Adding shredded pine needles, composted oak leaves or peat moss will assist in lowering soil pH over time. A quicker fix is the addition of two materials commonly used for this purpose: aluminum sulfate or garden sulfur. Aluminum sulfate will change the soil pH instantly because the aluminum produces the acidity as soon as it dissolves in the soil. Garden sulfur requires some time for the conversion to sulfuric acid with the aid of soil bacteria. The conversion rate is based on the fineness of the sulfur, the amount of soil moisture, soil temperature and the presence of bacteria. Based on these factors, the conversion rate of sulfur may be very slow and could take several months for a full effect. Acidifiers should be worked into the soil after application to be effective. Do not apply to leaf surface or burn may result. Read and abide by manufacturer instructions when applying.

Keep in mind that it takes time to alter soil pH and your soil will tend to revert to its old pH over time, necessitating repeated treatment. Attempting to change soil pH too quickly may shock and kill a plant. A good rule of thumb is to adjust no more than one point per season. It is also important to note that fertilizers recommended for acid-loving plants do not assist in adjusting the soil pH, but are instead formulated to work well in already acidic soil.

Acid-Loving Trees and Shrubs

Want to add gorgeous plants to your landscape without worrying about acidic soil? These plants thrive in soils with low pH, or come in for an expert consultation on your soil’s pH and what plants will do best in your garden, flowerbeds and landscape.

• Azalea
• Bayberry
• Blueberry
• Camelia
• Cranberry
• Dogwood
• Fir
• Fothergilla
• Gardenia
• Heath
• Heather
• Hemlock
• Holly
• Hydrangea
• Itea
• Leucothoe
• Magnolia
• Mountain Ash
• Mountain Laurel
• Oak
• Pieris
• Pine
• Raspberry
• Rhododendron
• Spruce
• White Cedar

If you have a lawn then you need to mow. If you need to mow then you may as well do it right, or else you risk weak, thin turf that is more susceptible to weeds, insect infestations and diseases. Fortunately, it’s easy to mow your lawn the right way!

8 Simple Steps for a Well-Mowed Lawn

1. Put Your Mower to Bed in Fall
   Service your lawn mower in the fall, after your last cut, so that you start the next mowing season right. For a gas mower, this means change the oil, drain the gas, replace the spark plug, change the air filter and lubricate the throttle cord. Maintenance is similar for electric and battery-powered mowers – be sure all the moving parts are properly lubricated, batteries are operating efficiently and cords are in good condition without snags, rips or bare wires. All types of mowers should have their blades sharpened in fall so they are ready for swift spring cuts.
2. Know How High to Cut Your Spring Grass
   Before your first cut of the spring season, fill your tank with gas (or fully charge batteries) and adjust your wheel height. Cool-season grasses should generally be cut at a height of 3 to 3 ½ inches. Never remove more than 1/3 of the plant. This longer height will require that you mow more frequently but it will ensure a stronger root system, help maintain soil moisture and will greatly reduce weed competition.
3. Only Mow When Dry
   Mowing a wet lawn is a sure way to spread disease and tear grass blades for a ragged look, plus wet clippings will clog blades and make mowers less efficient. The best time of day to mow is in the evening. Early in the morning, after the dew has dried is the second best time. Mowing in the heat of the day will cause your turf grass to go into shock.
4. Clear the Lawn
   Before you start your mower, clear all objects from the lawn. This includes toys, lawn furniture, trash, fallen branches, stones and anything that would cause you to stop and restart the mower. Keep your eye out for anything that is a hazard, including items that may get jammed in the mower or thrown by the mower.
5. Keep the Clippings
   Grass clippings are loaded with nitrogen, just what your lawn needs to stay healthy. Leaving the clippings on the lawn can reduce your fertilizer use by as much as 25 percent or more. Spread them out so that they don’t become anaerobic. Using a mulching mower will ensure the clippings are finely chopped and will decay more quickly, releasing their nutrition back into the lawn.
6. Stay Sharp
   Always keep your mower blades sharp. You may need to resharpen your blades during the growing season. Unsharpened blades rip and tear at the grass. This creates an environment conducive to the spread of turf disease. Dull blades will also cut unevenly, creating a ragged look even on a newly mowed lawn.
7. Change Directions
   Change directions each time you mow. Mowing causes the grass to lie over. Alternating your direction each time you mow will correct this problem and help strengthen your turf. You might even use multiple directions, including diagonal rows, and rotate through the pattern with each successive mowing.
8. Clean Up Afterwards
   Dirt and debris are the main causes of lawn mower engine failure. Always take a few moments after mowing for some preventative maintenance. Grab an old rag and wipe down your mower including air vent grates, blades and wheels to be sure your mower is ready to go each time you need it.

With the proper care, preparation and techniques, you can mow your lawn the right way every time, and you’ll be amazed at the different proper mowing can make to the healthy and vigorousness of your turf.

It’s easy to buy seedlings, but there are many reasons why you may wish to start your own plants. By starting your own seeds, you have a much greater selection of flowers, vegetables and herbs to choose from. For example, old favorites like hollyhocks and less common varieties of herbs and perennials as well as heirloom vegetables might not be available as plants, or stocks may be limited. Plants with fine seeds should also be started indoors because they can easily wash away in the rain and they may have a difficult time competing with weeds. Starting your own seeds can also help you extend the growing season so you can enjoy a longer, more productive harvest. So why not get started today?

Containers for Starting Seeds

Traditionally, seeds are started in flats or peat pots. There are various sizes of plastic trays, cedar flats, peat pots and the popular Jiffy-7, a flat, peat-moss wafer, available. When moistened, the Jiffy-7 expands to form a small, self-contained pot of soil into which a seed is sown directly. This is an excellent choice when sowing seed of plants that do not like their roots disturbed during transplanting. You might also use eggshells or folded newspaper pots to start your seeds.

Seed-Friendly Soil

It is best to use a light, soilless mix when starting seeds. These mixes are sterile, meaning young seeds do not have any weed seeds to compete with, and there are no harmful bacteria, insects or other pests in the soil right away. Good seed mixes also contain adequate nutrients to carry seedlings through until transplanting. Do not use garden soil, as seeds will not germinate well in the heavy soil, and a fungus disease called damping off is common.

Temperatures for Seeds

Most seeds require warm soil in order to germinate. You will need to heat the soil of the seedling flats with a heat mat, heat tray or heating cable. Seed trays can also be placed on top the refrigerator or hot water heater. Do not put seed-starting trays on a windowsill; nighttime temperatures are too cool to allow for good germination. Seeds need consistent warm temperatures of 75 degrees or warmer for optimum germination.

Seed Watering Needs

Seeds need to be kept constantly moist in order to germinate. Moisten the soil thoroughly before planting. Water when the surface is dry with a misting nozzle or plastic spray bottle until the soil is saturated. The medium should be constantly moist, but not soggy. It is important not to overwater, which could drown the seeds and tender seedlings, but also not to permit the flat to dry out.

Sowing Seeds

Seeds should be sown 2-10 weeks before the last spring frost date. Your seed packet will provide this information as sowing dates can vary for different plant varieties or even cultivars of the same plants. Fill your containers almost to the top with moist growing mix. Tamp it down gently and smooth it out. Gently press the seeds into the mix or simply set them on the surface of the soil and place milled sphagnum moss over the top to prevent damping off. Cover the container loosely with plastic wrap or a clear dome, which will help preserve moisture and warmth. Be sure to label your containers with plastic or wood plant stakes and write the plant name and the date sowed. Set trays in a warm spot and check daily to keep evenly moist.

Seedling Care

Once seedlings have grown a half-inch or so, you should water less frequently. Let the soil dry slightly between watering, which will help the seedlings stretch and develop a strong root system. Seedlings will also need light and the best method is to use the traditional fluorescent fixtures or the new energy-saving LEDs. Suspend lights just an inch or two away from the plants. Lights must be on at least 14-16 hours a day. As your seedlings grow, raise the lights accordingly so they do not bump into the lighting fixture. If your seedlings do not get enough light, they will become weak and spindly. Fertilize seedlings weekly with half-strength, balanced, organic fertilizer. A fish and seaweed blend works well. Thin seedlings if they become overcrowded, choosing the healthiest, strongest seedlings to save.

Hardening Off and Planting Out

When the weather is warm, move your seed trays outside gradually over a 5-7 day period. Start by putting them out just for a few hours during the late morning to mid-afternoon, and then gradually increase until they are left out all day and night. Keep them in a lightly shaded, protected spot during the day to prevent sunburn. After a week or two of this transition, gently transplant seedlings into the garden. Try not to handle the root ball too much, as they are quite fragile. Water thoroughly after transplanting and again every day for about a week. Newly set out plants will look sparse at first, but they will grow and fill in quickly, leading to bumper crops and a lush, delicious harvest!