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Grodan 1" x 1" Starter Plug Rockwool Hydroponic Grow Media (50 Cubes) (Full Size) (50 Cubes) (Full Size)

4.2 out of 5 stars 1,344 ratings
Currently unavailable.
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Brand Grodan
Item Form cubes
Coverage Full
Specific Uses For Product germination, cloning, gardening, plant cultivation
Manufacturer Grodan1231

About this item

  • Loose cubes great for germination or cloning
  • Great for hobby and commecial growers
  • Ideal for growers that don't want wasted cubes
  • Quick and easy to use. Grab what you need and save the rest.
  • Predrilled planting holes make seeding and plant propagation a breeze!
› See more product details

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Package Dimensions ‏ : ‎ 9.88 x 5.16 x 1.77 inches; 2.47 ounces
  • Item model number ‏ : ‎ SG_B01IKMJNG6_US
  • Date First Available ‏ : ‎ July 9, 2016
  • Manufacturer ‏ : ‎ Grodan1231
  • ASIN ‏ : ‎ B01IKMJNG6
  • Customer Reviews:
    4.2 out of 5 stars 1,344 ratings

Product Description

Loose cubes great for germination or cloning

Important information

Directions

Instructions for using the product in germination or cloning processes

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Customer reviews

4.2 out of 5 stars
1,344 global ratings

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Customers say

Customers find the rockwool cubes work well for starting seeds and appreciate their ease of use and strength. The size receives mixed feedback, with customers noting they are smaller than expected. Durability and value for money also get mixed reviews, with some finding them good quality and worth the price while others describe them as cheaply made and a waste of money.

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Seed startWorks wellEase of breakageEase of useDurabilityValue for moneySize
32 customers mention "Seed start"26 positive6 negative

Customers find these rockwool cubes perfect for seedlings and growing weed, with one customer noting that roots grow through them fantastically.

"...others but it didn’t effect how they work and would be better for anything with larger seeds. I put kale in them and they all germinated...." Read more

"...But good product, seeds have sprouted !" Read more

"...I place them in 1020 trays and plant the seeds. Those seeds start after only 1 day....I am sold on these and will be starting my seeds in these..." Read more

"it worked, plants started, cats ate them....still have more. will try again in a few years." Read more

32 customers mention "Works well"32 positive0 negative

Customers find that the rockwool cubes work well, particularly for starting seeds, with one customer noting they perform better than foam inserts.

"...I’ve planted in these now and they work great...." Read more

"Work well, BUT BE SURE TO WEAR Gloves or something , I made e mistake of not AMD touch my chest, it’s like insulation so it’s an extremely easy..." Read more

"First time I used these. Seem to do the job okay." Read more

"I used these for seed sprouting and they worked well...." Read more

6 customers mention "Ease of breakage"6 positive0 negative

Customers find the rockwool cubes strong and easy to break apart.

"...I put kale in them and they all germinated. They broke apart very easily with no tearing, I broke them apart while dry and did not soak them." Read more

"...The plants looked healthy, green and strong...." Read more

"Love having the hole already in the media. They were easy to break apart and put into the Extra Strength Seed Starter Kit, 2 Pack Combo, 2 of Each..." Read more

"Awesome product, these are quality made. The best customer service I've ever dealt with. Keep up the good work." Read more

6 customers mention "Ease of use"6 positive0 negative

Customers find the rockwool cubes easy to use.

"Easy pluggin" Read more

"The items were just as described. They were easy to use." Read more

"It's pretty simple and easy to use. Especially for germinated plant's seeds." Read more

"Great product and easy to use, I definitely will be using these again. Great value for their price tag" Read more

56 customers mention "Durability"31 positive25 negative

Customers have mixed opinions about the durability of the rockwool cubes, with some finding them to be of good quality while others report that they crumble easily and break apart too quickly.

"...But good product, seeds have sprouted !" Read more

"...the PH, I took it out of the water and a couple of the pods started to fall apart. Overall, you get what you pay for and I have had some plants grow...." Read more

"Not a bide product but a little smaller than I thought." Read more

"...To my surprise, I found only rotted ends, no roots. And after weeks, my seeds hadn't even germinated...." Read more

28 customers mention "Value for money"18 positive10 negative

Customers have mixed opinions about the value for money, with some finding it good value while others consider it very cheap and a waste of time and money.

"It was inexpensive and got here quickly...." Read more

"...These cubes will work for my lettuce starts but they are too small to be worth over $8. I will not be ordering again." Read more

"Good value for the money. They work." Read more

"Highly recommend these 1" rockwool cubes. They are a great value. Highly recommend!" Read more

37 customers mention "Size"10 positive27 negative

Customers report that the rockwool cubes are smaller than expected, with one customer noting they take four to fill a tray.

"...even small clones and are tapered at the top so are even smaller than 1" at the top...." Read more

"These are pretty small but I like the bare minimum for my seedlings...." Read more

"...They are the right size for a countertop hydro garden and at a fraction of the price of the other sponges...." Read more

"It was smaller than what I expected but it worked. I just used 2 blocks instead of one." Read more

Size is as stated
4 out of 5 stars
Size is as stated
They measure 1x1" at the top and taper to about .75" at the base, seem to be about 1.5" tall. They do seem to crumble easily; I separated them by slicing with a knife rather than tearing and had no problem.
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Top reviews from the United States

  • Rebecca R.
    5.0 out of 5 stars 100% recommend for countertop hydro gardens
    Reviewed in the United States on July 18, 2021
    Verified Purchase
    These are perfect for what I needed them for. I have a countertop hydro garden and the planting sponges that came with it are expensive to replace at $20 for 60. I was hoping these would work instead and they absolutely do! They are the right size for a countertop hydro garden and at a fraction of the price of the other sponges. I’ve planted in these now and they work great. I even like them better than the brown sponges because those tend to get green on the top while this rock wool has not. The hole in these is larger than the others but it didn’t effect how they work and would be better for anything with larger seeds. I put kale in them and they all germinated. They broke apart very easily with no tearing, I broke them apart while dry and did not soak them.
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  • LaZyGuN
    5.0 out of 5 stars Great for aeropod starters
    Reviewed in the United States on February 16, 2022
    Verified Purchase
    Purchase to germinate seeds for aeropods. I have trays for these where I'll separate these out into the trays and germinate the cells under a grow light. These are perfect fit for aeropods. I germinated first in the trays then I transferred these onto some 3D printed the seed trays for the aeropod garden that I have. These fit right in.

    Some tips:
    - You need to trim these a bit so that they fit into the aeropod. The pod isn't a square so just remove the corners (easy to rip off).
    - Stuff them down as into the pod if you can (very easy).

    I've had no issues having the roots grow out of these starter sponges so it does its job well
    One person found this helpful
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  • Matthew Andrews
    4.0 out of 5 stars Good!
    Reviewed in the United States on October 29, 2019
    Verified Purchase
    Work well, BUT BE SURE TO WEAR Gloves or something , I made e mistake of not AMD touch my chest, it’s like insulation so it’s an extremely easy irritate for me. But good product, seeds have sprouted !
    One person found this helpful
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  • Michelle L. Shankwiler
    5.0 out of 5 stars As described but not quite what I needed
    Reviewed in the United States on August 17, 2019
    Verified Purchase
    Though this product was as described, I wasn't as happy as I thought I would be. Perhaps I was used to the 1.5x1.5" ones I previously got at the local grow store. These tip easily with even small clones and are tapered at the top so are even smaller than 1" at the top. The packaging was sufficient enough but questionably done so with cut up ubused USPS priority boxes (item was not shipped priority) and packaging tape that stuck to the product.
    One person found this helpful
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  • Anne
    3.0 out of 5 stars Fell apart
    Reviewed in the United States on July 27, 2019
    Verified Purchase
    After soaking and adjusting the PH, I took it out of the water and a couple of the pods started to fall apart. Overall, you get what you pay for and I have had some plants grow. Next time, I will spend the extra money and buy better quality.
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  • i_fish_4_bass
    5.0 out of 5 stars Great product and great price
    Reviewed in the United States on June 6, 2021
    Verified Purchase
    First time I used these. Seem to do the job okay.
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  • Donna D.
    1.0 out of 5 stars Waste of money
    Reviewed in the United States on March 9, 2018
    Verified Purchase
    I had never seen these before but I wanted to start growing basil indoors. I watched a youtube video about propagating basil from clippings and the man in the video used these. I was so excited to start growing basil and I waited over a week and a half for these to arrive. More than half of them were cracked apart due to poor packaging. They arrived in a mailing envelope with nothing to prevent bending and squishing. I managed to salvage some and got started on my basil. I cut them into 4-cell blocks and transferred my clippings into the holes. I also tried to start some from seed. I purchased a humidity dome like in the video and I followed every step to the letter. I patiently waited to see roots come through the bottom, but nothing. The plants looked healthy, green and strong. I finally, after weeks of babying these clippings and seeds, decided to pull one out to have a look-see at how the root system was developing. To my surprise, I found only rotted ends, no roots. And after weeks, my seeds hadn't even germinated. I decided to simply put the clippings into a cup of water so I snipped off the rotted ends and placed them in water. I am now getting roots. Needless to say, I threw these in the trash. What a waste of time and money.
    3 people found this helpful
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  • Herbal Girl
    5.0 out of 5 stars Very small but easy to use.
    Reviewed in the United States on October 18, 2019
    Verified Purchase
    These are pretty small but I like the bare minimum for my seedlings. I don't like the bigger squares since they start to form algae if too much light hits them. These will hopefully work the way I need them to. (Support the seeds long enough to get good roots established).
    One person found this helpful
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