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will pennington weed and feed stop grass seed from germinating

When soil test results show your lawn’s soil pH is below levels needed for optimal grass health, liming in accordance with recommendations restores proper pH balance, increases nutrient availability and helps keep lawns green. While many lime products are slow to work, products such as Pennington Fast Acting Lime speed up the process and start working immediately.

When it comes to your lawn aspirations, you can bypass common grass seed mistakes and head straight for success. Make the most of your investment of time, money and grass seed, and enjoy the exceptional results. Pennington is committed to helping you grow the finest lawn possible and enjoy all the benefits that a beautiful, healthy lawn holds.

3. Using lime incorrectly or unnecessarily

Always read and follow herbicide and fertilizer labels, especially the instructions for use on newly seeded lawns and your grass type. As a general rule, avoid pre-emergent weed treatments at least 10 to 12 weeks before seeding — or longer for some products. After planting, reserve broad-spectrum weed treatments until new lawns have been mowed at least two to three times; for fall-planted seed, that usually means spring.

One of the ways weed treatments work is by preventing germinating seeds from establishing roots. But these products, known as pre-emergents, can’t distinguish between harmful weed seeds and desirable grass seed you put down. Using these products too close to newly planted seed — in timing or proximity — stops grass seed in its tracks, along with the weeds. Post-emergent weed treatments aimed at existing broadleaf weeds can also injure immature grass seedlings.

Knowing your total property size is just the start. All non-lawn areas must then be deducted. This includes the footprints of your house, garage and outbuildings, as well as walkways and the driveway. Only then can you calculate your actual lawn area and the amount of seed you need. Time spent on proper measurements prevents wasted product, wasted money and poor results. Get it right and every bit of seed and labor work in your favor.

There are a few variables that could affect the actual down time. How heavily the pre emergent is applied, how much irrigation it undergoes, and whether or not the soil surface is disturbed, all can lessen or increase the duration of its effectiveness. 

My lawn has several medium size crab grass patches. I was considering pulling these patches out and then putting down a pre emergent weed killer (can you recommend any?)
Then immediately I want to put down new sod. What do you think? I live in Ft. Myers, FL. The temps in the evenings is right at 60. 

QUESTION 1:  When Should I Apply Pre Emergent and Reseed?

Many gardeners have inquired about their options in specific situations. Let me share some of the approaches we recommend for them. 

An interesting Catch-22/Murphy’s Law factor should be considered in your situation. 

The other consideration is if you were planning to broadcast the pre-emergent weed killer over the entire lawn area, or just in the bare spots that you need to replant.