Following are the most common reasons Preen Garden Weed Preventer Plus Fertilizer may not have worked: The growing weed is not on the list of weeds that Preen Garden Weed Preventer Plus Fertilizer prevents. Preen Garden Weed Preventer Plus Fertilizer was not uniformly spread across the soil surface or the area was disturbed.

Preen Garden Weed Preventer was not uniformly spread across the soil surface or the area was disturbed. Preen Garden Weed Preventer was not watered or lightly raked into the soil, causing the Preen Garden Weed Preventer chemical to photodegrade and lose its strength. Preen Garden Weed Preventer was not reapplied within 8 to 12 weeks.

Weeds germinate in the spring, summer, and fall. Preen Garden Weed Preventer should be used during each of these seasons to prevent weeds.

Preen Garden Weed Preventer may be used either before or after transplanting. When applying Preen Garden Weed Preventer after planting seedlings, keep Preen Garden Weed Preventer away from the seedling's direct root area and foliage. Do not apply until the seedling has been thoroughly watered and the soil has firmly settled around the plants. Be sure to wash or brush off any Preen Garden Weed Preventer granules that may have fallen on the foliage to prevent plant stress.

If you are top dressing 1 to 2 inches of mulch over existing mulch, apply Preen Garden Weed Preventer before you add the new mulch.

Preen Garden Weed Preventer has an indefinite shelf life as long as the container is closed and the product is kept in a cool, dry area.

Preen Garden Weed Preventer Plus Fertilizer effectively combines the two steps of weed prevention and fertilizing into one easy step. Preen Garden Weed Preventer Plus Fertilizer prevents summer and winter annual weeds from growing in flower and vegetable beds and around trees and shrubs for up to three months. The balanced 9-17-9 fertilizer of nitrogen, phosphorous and potash works to provide abundant blooms, increased yields, strong root development and improved plant vigor.

If you have weeds in your garden, remove the weeds by pulling or hoeing them, or use an all-purpose weed killer of your choice. Sprinkle Preen Garden Weed Preventer Plus Fertilizer evenly over the soil surface at the rate of 1 oz. per 10 sq. ft., being sure to keep granules away from plant roots and foliage.

Preen Garden Weed Preventer prevents summer and winter annual weeds from growing in flower and vegetable beds and around trees and shrubs for two to three months. It does not kill existing weeds.

Preen Garden Weed Preventer can be reapplied every 8 to 12 weeks. The rate at which Preen Garden Weed preventer biodegrades in the soil and loses its effectiveness will depend on temperature, soil type, and moisture conditions of the soil. Preen Garden Weed Preventer will need to be reapplied more often in hot, humid conditions.

Preen Garden Weed Preventer can stain porous surfaces such as concrete, stone, vinyl, flooring, clothing, and shoes if Preen Garden Weed Preventer is not swept off these surfaces or if Preen Garden Weed Preventer becomes wet on these surfaces. If you are storing the drum or bag in a potentially damp or humid location, place cardboard under the Preen Garden Weed Preventer container to prevent yellow stain seepage.

Preen Garden Weed preventer can be applied at anytime around spring flowering bulbs. The best time to apply, however, is in late winter or early spring prior to bulb emergence. If applying after the green leaves have appeared, be careful not to get the material on the leaves or into the crown of the plant as discoloration or flower stunting could result. For summer flowering bulbs that are planted in the spring, plant bulbs first, water in thoroughly, then apply Preen Garden Weed Preventer.

Preen Garden Weed Preventer is not able to recognize a weed seed from other seeds, and therefore should not be used until plants have germinated and are 2 to 3 inches tall.

Preen Garden Weed Preventer can be applied around Periwinkle (also known as Vinca rosea or Vinca multiflora), a bushy type plant about 15"-18" high that bears pink, rose, or white flowers.

If you are mulching 2 to 3 inches for the first time over bare soil, it is preferable to apply Preen Garden Weed Preventer to the soil first. If weeds appear, it is likely that there were weed seeds in the mulch. In this case, remove these existing weeds, apply Preen Garden Weed Preventer, and water or rake it into the top layer of mulch.

Preen Garden Weed Preventer is safe with birds as long as the product has been watered or incorporated into the soil.

If a human or pet digests Preen Garden Weed Preventer, please call 888-208-1368 (Prosar Corporation).

Preen Garden Weed Preventer Plus Fertilizer is not intended for use on lawns; severe damage will result. For lawn weed control, see products listed under lawns.

For optimum weed control and plant feeding, apply Preen Garden Weed Preventer Plus Fertilizer in the early spring. Reapply Preen Garden Weed Preventer Plus Fertilizer 4 weeks after the first application. Subsequent applications may be made in 8 week intervals throughout the growing season. The rate at which Preen Garden Weed Preventer Plus Fertilizer biodegrades in the soil and loses its effectiveness will depend on temperature, soil type, and moisture conditions of the soil.

Preen Garden Weed Preventer Plus Fertilizer can stain porous surfaces such as concrete, stone, vinyl, flooring, clothing, and shoes if Preen Garden Weed Preventer Plus Fertilizer is not swept off these surfaces or if Preen Garden Weed Preventer Plus Fertilizer becomes wet on these surfaces. If you are storing the drum or bag in a potentially damp or humid location, place cardboard under the Preen Garden Weed Preventer Plus Fertilizer container to prevent yellow stain seepage.

Preen Garden Weed Preventer Plus Fertilizer may be used either before or after transplanting. When applying Preen Garden Weed Preventer Plus Fertilizer after planting seedlings, keep Preen Garden Weed Preventer Plus Fertilizer away from the seedling's direct root area and foliage. Do not apply until the seedling has been thoroughly watered and the soil has firmly settled around the plants.

Preen Garden Weed Preventer Plus Fertilizer can be applied at anytime around spring flowering bulbs. The best time to apply, however, is in late winter or early spring prior to bulb emergence. If applying after the green leaves have appeared, be careful not to get the material on the leaves or into the crown of the plant as discoloration or flower stunting could result.

Preen Garden Weed Preventer Plus Fertilizer is not able to recognize a weed seed from other seeds, and therefore should not be used until plants have germinated and are 2 to 3 inches tall. Preen Garden Weed Preventer Plus Fertilizer may be used with potted plants and planter boxes. Be especially careful not to exceed the recommended rate. Do not use Preen Garden Weed Preventer Plus Fertilizer in greenhouses or other enclosed areas as damage to plants could occur due to volatilization.

Preen Garden Weed Preventer Plus Fertilizer can be applied around Periwinkle (also known as Vinca rosea or Vinca multiflora), a bushy type plant about 15"-18" high that bears pink, rose, or white flowers.

If you are top dressing 1 to 2 inches of mulch over existing mulch, apply Preen Garden Weed Preventer Plus Fertilizer before you add the new mulch.

If you are mulching 2 to 3 inches for the first time over bare soil, it is preferable to apply Preen Garden Weed Preventer Plus Fertilizer to the soil first. If weeds appear, it is likely that there were weed seeds in the mulch. In this case, remove these existing weeds, apply Preen Garden Weed Preventer Plus Fertilizer, and water or rake it into the top layer of mulch.