New Castle Gardens is open by appointment only until spring. Please call 970-984-3850.

We are doing zero contact sales. Masks are required. 6-10 foot social distancing. 4 people in the store/greenhouse at a time.

Gardening Supplies

Soils & Amendments

Online Gardening Classes

Thank You for Choosing Us as Locals’ Choice Best Garden Center / Nursery 3 Years in a Row!


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This Saturday 10/24/20

Pumpkins for Sale Oct 24th

Locally grown by Belleza Pura Farm
Hours: 9-whenever the pumpkins are gone!

Current Sales

50% Off All Remaining Seeds

10% Off Soils and Amendments
(not including bulk)

Winterize Your Garden and Lawn

Sulphur, Compost, Mulch and Lawn Fertilizer

Winter 2020 Garden Prep

Pull all weeds from the bed, including the roots, to prevent them from taking over the bed in spring. Remove garden debris that might harbor insects or diseases that could attack your new plants in spring.

Use sulfur to lower the soil pH. Spread the sulfur over the surface of the garden bed and work it into the top 12 inches of soil. Sulfur requires about three months to alter the pH, so fall application works best. New Castle Gardens carries sulfur in 4# and 50# bags.

Spread compost over the surface of the bed. Apply it in a 2-4″ thick layer. Compost improves soil moisture retention and drainage, while also improving the texture of sandy or clay soil. Mix the compost into the top 6 to 8 inches of soil with the spade or tiller. New Castle Gardens will be using Black Gold OMRI Garden Compost this year.

Cover the bed with a 2-3″ layer of mulch. Mulch prevents weeds from invading the dormant bed during winter. New Castle Gardens has multiple bark mulches available. We also have 5 cubic yard bales of natural red cedar gorilla mulch for larger projects.

Now is the time to feed your lawn for winter. We use natural, organic-based Pro-Rich Turf Food. This is an all season food. It does not contain any chemicals that can harm children or pets

Adapted from: https://homeguides.sfgate.com/prepare-garden-soil-fall-next-year-71643.html

Current Sale

50% Off All Remaining Seeds

  • New Castle Gardens

    6501 CR 214
    New Castle, CO 81647
    Open: By Appointment Only
    Masks Required. Only 4 People Inside At A Time.

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  • Seeds

    Due to increased order volume, Botanical Interests is not receiving new orders until 4/15/2020.

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