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  • Seed Trays
  • 1020 Blackout Humidity Dome

    36 reviews

    Blackout Humidity Dome

    Those Extra-Strength Humidity Domes you love are now available for blackout application. These blackout domes for 1020 trays help regulate your seedlings' growing conditions and help cut down on watering. Maximize germination while providing your seedlings with the proper blackout period with our heavy-duty blackout domes.

    Not sure how to use a blackout dome? Read Microgreens and When to Use a Blackout Dome.


    • Made from Extra Strength recycled plastic
    • Dome reaches 6" above the top of the seed tray (5½" interior space). Outer Dimension: 21¼" x 11" x 6"
    • Available with 2.5" dome and 6" dome height
    • Adjustable Humidity Vent
    • Not intended for use in direct sunlight
    • Easy-grip handle attached to cloning dome.
    • Provides tray with blackout period with a snug fit
    • Fits 1020 trays and plug trays, including all those sold by Bootstrap Farmer

    Free shipping on orders over $49 to Contiguous US

    Shipping Policy

    Most products will ship from our facility in 1 to 2 business days after the order is placed.  Express shipments placed after 12PM EST will be shipped out next business day. Full details can be found on our Shipping Policy Page

    Returns Policy

    Returns can be made on most products within 30 days of purchase. After 30 days we unable to offer a refund or exchange. Certain products are non-returnable. For full details visit our Returns Policy


    Ask a Question
    • What's the function of a blackout dome? Why does this product exist, I'm curious the role it plays in starting seeds.

      Its primarly used for things like microgreens that need a light deprivation period to germinate well.  Some microgreen require it for the entire growing period.

    Customer Reviews
    4.7 Based on 36 Reviews
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    Filter Reviews:
    John F.
    United States

    Great product and even better customer service.

    Package arrived damaged. Took a picture of box and broken item and it was resolved effortlessly with help from Annie on 2/21/2024. The colored 10x20 trays are one of my favorite garden purchases ever. Will be back for ten more for sure. 10 out of 10 products and service.

    Michael SVG verified by SHOP
    United States United States

    When I received the dome it was cracked in two places. The dome is very flimsy

    Emily D.
    United States United States

    Could be a little sturdier

    These domes are great as far as their overall design but I think it would be helpful for them to be a little sturdier so that they can take a tumble every now and then without breaking.

    Tom S.
    United States United States

    California Heat

    These were outside and not in direct sunlight. Melted at 104 degrees.

    Bootstrap Farmer 1020 Blackout Humidity Dome ReviewBootstrap Farmer 1020 Blackout Humidity Dome Review
    Andrea D.
    United States United States

    Really nice quality

    The black domes were really smooth and just what I needed. I had been using the clear humidity domes and then covering with black fabric which wasn’t very efficient. It’s the perfect example of how the right tool for the job can streamline the process.