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use fertilizer before weed and seed

After spraying the weeds with herbicide, it is good practice to wait at least one week before fertilizing. In fact, your grass needs fertilizing even through the fall and winter. A good rule of thumb is fertilizing at least four times a year, such as every two months during fall, winter and spring. Skipping fertilization during the summer is often practiced because the water to wash the nutrients into the soil, whether from rainfall or watering, may evaporate quickly and impede the fertilizer’s performance.

Relying on herbicides for constant weed control is not the best way to maintain your lawn. A healthy, thick grass structure creates a barrier to germinating weed seeds because sunlight cannot penetrate through the blades to stimulate seed growth. Grass blades should stand at least 2 inches tall to retain this barrier against weed seedlings. In addition, keeping a pH meter handy to test your soil is a practical strategy for maintaining your soil. If your soil stays at a pH of 7.0, the grass has the best environment for thick and lush growth.

Timing Grass Fertilization

Your lawn may not look like a professionally maintained park if it has dandelions and other weeds scattered around it. If you plan to use weed killers to deal with the weeds and fertilizers to make the grass lush, you need to apply them in the right order for the best results.

Spraying weeds with a safe herbicide is the first course of action to improve your lawn. Weeds steal water and nutrients from your grass, especially because both plants’ roots populate the first few inches of the soil. If you have bare spots across portions of your lawn, you can till these areas to bring any weed seeds to the surface. Apply a preemergent herbicide to the bare soil and wait the recommended period of time before reseeding with the appropriate grass species. Bare spots less than the size of your hand will fill in naturally. Spray any weeds that appear with an herbicide, such as a glyphosate product, to stop further weed growth.

The lawn improvement marketplace is full of convenient weed and feed products. However, these mixtures do not kill established weeds; rather they use preemergent herbicides to impede weed germination. If you have an established weed problem, avoid the weed and feed mixtures and use the spot spray strategy. Overall, using herbicides and fertilizers separately allows you to control their application closely for the best lawn care.

Between February and April, temperatures warm and weed seeds start to germinate. Prevent new weeds — and feed your lawn in the process — with Pennington UltraGreen Crabgrass Preventer Plus Fertilizer III 30-0-4. You can stop new weeds before their roots get established and control new weeds for up to five months.

Always read product labels thoroughly and follow instructions, including specific guidance for your grass type.

When and How to Fertilize Established Lawns

Whenever you apply fertilizer, always follow best practices for fertilizer safety. For best results, mow your lawn one to two days beforehand. Then set your spreader to the setting recommended on the product label.

If you plan to overseed, avoid weed & feed for four weeks before. After overseeding, wait until your third mowing occurs. For sodding, sprigging or plugging, wait four weeks before you weed & feed so new grass can start without delay.

Between August and November, grass slows down and prepares for the winter months. At the same time, broadleaf weeds start active growth again. With Pennington UltraGreen Winterizer Plus Weed & Feed Fertilizer 22-0-14, you can feed your northern or southern lawn nutrients essential to its winter prep and spring green-up — and kill broadleaf weeds. As a general rule, allow six to eight weeks between fertilizing and your first expected frost.