FAQ & Safety

  • What is Bay State Fertilizer?

    Bay State Fertilizer is a 100% recycled fertilizer product made from solids recovered from the wastewater of 43 Massachusetts communities served by the Massachusetts Water Resources Authority. These solids are rich in organic matter and nutrients. MWRA first treats the solids biologically, using beneficial microorganisms to consume nutrients from the solids. The microorganisms are then tumble-dried at very high temperatures to destroy harmful bacteria. The resulting biosolids fertilizer meets the highest EPA quality standards. These safe, easy-to-use granules now bring new life to lawns and gardens while keeping Massachusetts waterways clean.

  • What about phosphorus?

    The phosphorus in Bay State Fertilizer is bound; it does not leach, but is still available to plants that need it.


  • Is the product safe?

    Yes it is; we meet the highest EPA and Mass DEP standards for biosolids fertilizer. The fertilizer is classified as “exceptional quality” by EPA. Like most other fertilizers and landscaping products, we recommend you store the product out of reach of children and pets. We also recommend you do not use this product on pastures with grass that will be grazed by ruminants, as this product contains more than .001% of molybdenum, and excessive molybdenum consumption by these animals can cause a nutritional imbalance.

  • How can I buy the product?

    Give us a call at the number listed below or use the contact form on the home page to set up an order.

  • How much is the product?

    Bay State Fertilizer rates vary depending on if you purchase directly from us and pick up, have it delivered from us, or purchase it from a retailer. Contact us for an estimate.

  • What does 4-3-0 refer to?

    The 4-3-0 designation refers to the percentage content of nitrogen, phosphorous, and potassium in the product. We guarantee at least 4% nitrogen, 3% phosphorous, and 0% potassium in every bag.

  • What makes organic fertilizer different from other fertilizer?

    Organic fertilizers get their nutrients from natural sources as opposed to chemical ones. Organic fertilizer also releases these nutrients at a slower rate, allowing for proper lawn feeding over a longer period of time. Organic nitrogen will not burn your lawn.

  • Does this product have an odor?

    As with most organic fertilizers, this product might produce a slight odor when it first becomes wet. The odor usually dissipates in a few days.

  • How often do I need to apply Bay State Fertilizer?

    It depends on what you use the product on. For lawns, we recommend 3 applications, one in late April, one in late July, and one in mid November. For shrubs, apply when transplanting or in the spring for fertilization. For gardens and annuals/perennials, blend into the soil at the time of planting. For more detailed information, visit our application page.

  • When do I need to water it?

    Bay State Fertilizer’s formula reduces the need for frequent watering through organic nitrogen that doesn’t dissolve in water. Instead, microorganisms mineralize the nitrogen and make it water-soluble inorganic nitrogen that plants can use. This essentially means that when it rains, the soil can hold more water than usual, allowing for less amounts of water needed. You can water it after being placed to speed up the process, but it isn’t necessary.

  • How should I store the product?

    Store Bay State Fertilizer in a cool environment that is free from moisture. Make sure that the product stays dry for maximum effectiveness. Store the product away from children and pets as well.

  • Does Bay State Fertilizer have other uses such as killing weeds?

    No, Bay State is just a fertilizer. Some users have reported that the odor from the product works to repel deer, however.

  • Are there heavy metals in Bay State Fertilizer?

    All fertilizers contain some heavy metals. Some metals such as calcium, copper, and zinc are actually very beneficial for plant growth. Bay State Fertilizer meets the highest EPA and Massachusetts DEP metal requirements for fertilizer in order to make sure plants get the metals they need while keeping the product safe.