When to Apply

Apply anytime in the spring and fall after renovating beds. For best results, apply Preen Mulch Plus after flowers and ornamentals have been planted into the soil. Do not apply over flower seeds.

Ornamental Bulbs — Apply two to four weeks after planting, or before or after flowering. Do not apply to bulbs when flowering, since flower discoloration may occur.

How to Apply

Bulbs and Perennials — Spread Preen Mulch Plus over the area to a depth of two inches. Do not plant flowers directly into mulch. If additional planting is desired after Preen Mulch Plus has been applied, first remove the mulch from the selected area. Avoid getting treated mulch in the planting hole. Once the plant is firmly embedded in the soil, replace the mulch around the plant.

Annuals — After plants have been set in the soil bed, spread Preen Mulch Plus over the area to a depth of two inches. Make no more than one application of Preen Mulch Plus per site per year. Take care not to get Preen Mulch Plus on the plant foliage, brush off stray mulch to minimize damage. 

Maintaining Weed Control
To maintain weed control after Preen Mulch Plus has been down for 6 months, we suggest applying either Preen Garden Weed Preventer or Preen Weed Preventer with Brilliant Blooms Fertilizer.