How long after applying Preen can I plant?
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Preen Vegetable Garden Organic Weed Preventer
If you choose to use the organic corn gluten meal Preen, you must wait six weeks after application before sowing seeds or planting young transplants.
In respect to this, how long does preen last?
12 weeks
Similarly, you may ask, can you use preen around new plants?
Preen is safe to use in flower gardens once plants are established. Label instructions suggest using the product after ornamental flowers, grasses and shrubs are at least 3 inches in height. Flower seeds sown into the garden after an application of Preen will not germinate.
Preen is a pre-emergent herbicide that kills germinating seeds. It will not harm vegetable seedlings or kill established weeds. When Preen is spread evenly over the soil, it forms a chemical barrier that will prevent most weed seeds from emerging.