This product will ship for free within United States including Hawaii and Alaska. Please provide an address that the Post Office can deliver to. If items that are not eligible for free shipping are placed in your cart you will be charged for shipping on those items only. All orders over $250 will be shipped for free (excluding Alaska and Hawaii). Look for the "Free Shipping Icon" for the best deals! Nitrogen Boost contains only Nitrogen and is very concentrated. At 1 – 4 mL per gallon a little goes a long way. Use Nitrogen Boost any time additional levels of Nitrogen are needed.
CAUTION: Nitrogen Boost is extremely concentrated and overuse may cause leaf burn!!
