Giant Portabella Mushroom Kit

Giant Portabella Mushroom Kit

Place Your Order
Giant Portabella Mushroom Kit
Item # 40-484

Giant Portabella Mushroom Kit is Fun, Easy and Foolproof

  • Grow your own huge portabella mushrooms
  • Easy to use and produces multiple harvests
  • A fun family project; makes a welcome gift
  • Please allow 6 to 12 days for delivery

The filet mignon of fungi! Giant portabellas can reach up to 8" across and are perfect for grilling. Growing your own mushrooms is a fun and rewarding family activity. With this easy-to-use kit, you can expect to harvest your first batch of giant portabellas in about four weeks. You'll get several crops over an 8- to 12-week period, with a total harvest of about four pounds. Please start growing within 2 weeks of arrival.

  • Compost, mushroom mycelium, peat moss
  • Box is 12" L x 10" W x 9" H
  • Portabellas grow best indoors at 63 to 68 degrees F out of direct sun


by PowerReviews

(based on 3 reviews)


of respondents would recommend this to a friend.

Reviewed by 3 customers

Sort by

Displaying reviews 1-3

Back to top


bad investment

By Ms. Nature

from Cocoa, FL

Verified Buyer


  • None


  • We Got No Mushrooms

Best Uses

    We have tried these kits twice and never got one mushroom. Tried to diligently follow the guidelines, especially the second time. Still -- nothing.

    • Was this a gift?:
    • No

    mushrooms grown safely

    By Betty

    from Corvallis, OR

    Verified Buyer



        Best Uses

          Just set outdoors

          • Was this a gift?:
          • Yes

          (1 of 3 customers found this review helpful)


          mushroom kit

          By Jim

          from Vernon, N.J>

          Verified Buyer

          Great idea-it should produce lots of mushrooms!

          Displaying reviews 1-3

          Back to top



          • International delivery is not available for this item
          • Sorry, no shipments to AA,AE,AF,AK,AP,GU,HI,PR,VI
          • Faster shipping is not available for this item.
          • Please provide a physical street address for delivery.
          • Would you like to specify a delivery week? Call us at 1-888-833-1412 to place your order!


          We're a B Corp!

          Gardener's Supply is pleased to be part of a class of companies called B Corps. With this certification comes a dual mission that combines bottom-line success and social responsibility. In short: Do well and do good.

          Learn More

          Learn and Share

          Our website is packed with how-tos and inspiration, as well as opportunities to share with fellow gardeners. Check back often to view new articles, videos, blog posts and Facebook updates and join our online community.

          Learn & Share

          Satisfaction Guaranteed

          We stand by the quality of our products and our service. If for any reason you're not satisfied with your purchase, you can return it to us for an exchange, refund, or credit.

          Learn More