Rated 4.9 out of 5
Based on 46 reviews

Seedling

Regular price$29.99
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✓ Scientifically blended for robust root development
✓ Proudly peat-free with carbon-capturing biochar
✓ Made from natural & upcycled ingredients

  • NUTRIENT-PACKED: Enhances soil aeration, drainage, and nutrient absorption, providing the ideal foundation for robust seedling and propagation growth.
  • RESEALABLE: Thoughtfully packaged in plant-based packaging, our Seedling Mix is available in a convenient 8lb size, making it perfect for nurturing young plants.
  • SUSTAINABLE: Crafted from eco-conscious, premium ingredients such as biochar, worm castings, mycorrhizae, pine bark fines, sand, and compost, our Seedling Mix is completely free from peat and synthetic additives.
  • LIVING SOIL: Enriched with beneficial fungi and microorganisms, our Seedling Mix is designed to foster vigorous root development, ensuring your seedlings and propagations thrive.
  • MISSION-DRIVEN: Our carbon-neutral blend contributes to the fight against climate change and is tailored to meet the specific needs of all types of seedlings and propagations, including vegetables, flowers, herbs, houseplants and more.

Biochar is a horticultural charcoal that holds onto oxygen and nutrients while also storing microbes and carbon in the soil.

Worm Castings are nutrient-rich organic matter produced by worms that provide plants with essential nutrients.

Mycorrhizae are beneficial microorganisms that form a symbiotic relationship with plant roots, allowing the plants to absorb more nutrients.

Sand has large grain size, coarse texture, and high silica content to support soil drainage.

Pine Bark Fines are a byproduct of the mulch industry which enhance soil structure and improve aeration.

Compost helps reduce waste in landfills by turning green waste and wood waste into a useful source of nutrients for plants.

PLANT

Seedlings: Select a well-draining seed tray or planter and fill it with Rosy Soil. Follow your seed packet's instructions regarding sowing depth and spacing. Avoid over-seeding as too many seeds in a small area can hinder growth.

Propagation: Partially fill a well-draining pot with Rosy Soil. Gently place your cutting into the soil, ensuring the roots are covered. Cover with additional Rosy Soil, leaving at least an inch at the top for easy watering.

WATER

Water slowly and thoroughly unitl it drains from the bottom. Aim for light, even moisture throughout the mix.

CARE

Place the tray or container in a warm location with indirect sunlight or under grow lights. Keep the soil consistently moist, but not damp, and adjust watering as needed.

TRANSPLANT

Once the seedlings or propagated cuttings have grown and the weather permits, transplant them into larger pots or your garden.

At Rosy, our entire supply chain has a net neutral carbon footprint!

How?

We maintain an eco-friendly system (from production to delivery) by curating the most sustainable ingredients (like carbon negative biochar), packing processes, and shipping. 

In fact, every bag of Rosy indoor mix helps captures CO2 from the carbon cycle.  

So, our seedling mix is a positive resource for your garden and the environment. 

Find out more in our Life Cycle Assessment.

Guaranteed Analysis 0.70-0.04-0.06

Total Nitrogen (N) ..................................0.70%

     0.70 % Water Insoluble Nitrogen

Available Phosphate (P2O5)...................0.04%

Soluble Potash (K2O).............................0.06%

Derived from compost, worm castings

ALSO CONTAINS NON-PLANT FOOD INGREDIENTS 

Soil Amending Guaranteed Analysis

Active Ingredients

     Rhizophagus irregularis.........4 propagules/g

     Funneliformis mosseae..........2 propagules/g

     20% Wood biochar

Inert Ingredients

     80% Total Other Ingredients (inert as non-plant food ingredients)

Ingredients: compost, bark fines, biochar, sand, worm castings, and microbes

Biochar may reduce soil density and increases soil aeration. Mycorrhizae may promote root mass expansion and nutrient efficiency.

Enriched With Root-Boosting Biochar

Peat And Synthetic Free

Helps With Transplant Success

Resealable Bag Made From Plants

US VS. THEM

Footprint Carbon Neutral + 3.38 kg
Ingredients Premium, natural-based, and eco-friendly Low-quality, non-renewable, and synthetic
Packaging Resealable, recyclable, and made from plants Flimsy plastic made from fossil fuels
Formulation Designed by scientists to naturally support healthy plant growth Designed to cut costs and drive profits

FAQs

Peat moss has been a common ingredient in commercial potting mixes since the 1960s. However, it's obtained by extracting peat bogs, which are vital ecosystems that store carbon. At Rosy, we believe there's a better way. So, we've developed our blends with alternatives that are effective and sustainable.

Rosy’s seedling mix is all-natural, peat free, and made from biochar. 

We’ve consciously sourced our ingredients not only because they’re great for your plants but also because they’re good for our planet

Unlike traditional potting soil ingredients that are environmentally taxing, our biochar potting mix only contains natural and carbon-negative amendments.

Read additional information about Our Mission.

We use carbon-negative, organic ingredients to create the seedling potting mix.

Typically, these organic materials are sent to a landfill, where they release methane and CO2 — two potent greenhouse gases. But by redirecting these organic materials from landfills and stabilizing their carbon structure, we prevent the release of those greenhouse gases.

Essentially, we turn our soil into a carbon sink, which means it helps to remove CO2 from the atmosphere.

Discover more about what we mean by Earth Positive on Our Mission page.

average rating 4.9 out of 5
Based on 46 reviews
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46 Reviews
Reviewed by EeeJayCee
Verified Buyer
Review posted
I recommend this product
Rated 4 out of 5

I was REALLY skeptical about this seed starting mix…

...upon opening this bag and seeing the makeup of it. First off, it is very, very black. I've never seen a soil mix so black. Is it the biochar?? It is also very well-draining; the water goes right through because it doesn't appear to have anything in it to hold onto the water (vermiculite, coco coir, peat moss). I get that it has all the good stuff that you want in a seed starting mix (compost, worm castings, mycorrhizae). But the very large pieces of bark that you find in this (and it's throughout the whole bag; it's not just a matter of the finer components settling to the bottom and then the bigger, "lighter" components remaining at the top) made me really question whether this would even work as seed starter. But I'm taking a risk, because if I give this seed starter a couple of weeks and still nothing grows, that pushes my seedlings that much further into the short spring growing season I have where I live (desert of SoAZ). At the same time, I've been trying to start seedlings indoor for a few seasons now, and often unsuccessfully, even with the finer, lighter seed starting mix of other brands and mixed with worm castings and coconut coir, mind you. Even that has given me choppy results, so at this point, really, what do I have to lose (again)? Half of the time seeds will germinate "on time," the other half of the time the seeds take forever to germinate.

Well, it's been only 3 days and I am VERY pleasantly surprised. Of the 15 different seedlings I planted, about 4 of…

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Reviewed by Lam
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5

Great starting soil

I've been using this soil to start my garden off this year. And I've had high germination planting seeds directly into this soil. I would recommend transplanting once your started your seeds because I find the it will dry a bit quick once the plants are a couple of weeks old. The main thing I notice, is the drainage is great, but this also means it will dry out quicker. This mix works great for new seedling starting, and the root growth has been extremely quick. Everything's produced a great green color and I'm happy with the start I had to the garden this year with this soil.

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Reviewed by Tech S.
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5

Game Changing, Premium Soil

First of all, it is difficult to ignore the price tag of this premium soil mix. It is expensive. But after seeing, handling and using it for my houseplants, I cannot deny that this soil is different.

I normally buy brand name general, all purpose potting soil. Rosy soil is much darker, richer and denser than normal potting soil. No fillers, it doesn't dry out, and it comes in a resealable bag.

To compensate for the expense, I combined the Rosy soil with the regular potting mix the last time I repotted some of my houseplants. The plants cannot talk, but if they could. I think they would thank me!

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Reviewed by Shelley
Review posted
I recommend this product
Rated 5 out of 5

5 Stars

Love the Company, respect the mission, appreciate the quality, and grateful for the impeccable shipping and service.

Checks all the boxes for me....AND my plants!

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Reviewed by Helsa11
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5

High Quality

I was excited to receive this rosy soil so that I could start my flower seeds indoor this year. The package says that it is also good for propagating plants, which is a huge plus!! The bag has a great pull tab to easily unseal the package, and then it is resealable! The mix seems to be a very high quality. It has bark in it which is good for aeration. It is a very dark color, nearly black, so you may want to wear gloves when handling. The only downside is that because the color of the soil is so dark naturally, it is hard to tell when it is moist (and of course you want to make sure your soil stays moist when starting seedlings). I am already looking into buying more rosy products for my other soil and planting needs!

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Reviewed by Gail
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5

The best soil - ever - for my microgreens

At the recommendation of the Rosy Soil people I bought the seedling soil for my microgreens. I love the rich dark color. I had a feeling that the bio char and worm castings would be beneficial and they are. My micro greens were ready 2 days earlier than usual. My husband and I both felt their flavor was improved!

I love that this soil does not have that awful chunky white rocky stuff in it - forgive me, I forget what it's called but it's in most soils. With Rosy Soil I'm getting 100% growing medium that's rich and robust.

Historically one uses some sort of seaweed fertilizer for micro greens. I have not felt the need to do this with my Rosy Soil - which is nice, it's one less thing to fuss with, and one less expense. I'm getting highly nutrient dense micro greens with just this great soil.

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Reviewed by Lea
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5

Rosy Soil will be your new favorite potting soil.

I love this potting soil. It’s pricey, but well worth the extra money when it come to healthy house plants. I always have a bag on hand now for repotting and new house plants.

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Reviewed by Ajax
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5

Great Way to insure great looking healthy plants.

This seeding mix from Rosy works to grow and keep your houseplants or outside deck plants looking great. This is a organic mix so you can use it and not worry. I live near the 45th parallel so I have a very limited growing season June, July. August if lucky so starting your outdoor plants early is a better way to grow and maintain them. Make sure you read and follow the recommendations on the easy open close package. Now I can enjoy my work longer when I set on my deck and relax or when we have get togethers and I receive many nice remarks on how nice all the plants look. This comes in a resealable bag make sure you read and follow the instructions.

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Reviewed by Lisann0514
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5

Great Soil to use for seedlings

We used the seedling soil to start our seedlings for our garden this year. It was easy to use and not messy like other soil we have used in the past. One of the best things about this soil was when scooping into the the seedling starter kits it was soft and not chucks of soil. We really hope our seedlings like this type of soil and our garden is able to have a great start to the year.

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Reviewed by Curious
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5

Deep black color

The last time I saw soil this color was in Iowa, the bread belt of the nation, which has deep, dark, rich, loamy soil. I've never seen this black color in a potting mix. When working with it I found that there are lots and lots of very small bark pieces in it which are visibly hidden at first because of the blackness of the soil. The bark adds an organic element which helps to increase aeration too, but it feels like there may just a little bit too much of it, so I worked in a tablespoon of worm castings to the soil of each pot to offer the sprouting plants a little easier access to beneficial nutrients. I was able to fill twenty 3-1/4" seedling cups and still have a half a bag left. Going to finish it off in the next couple of days. The bag itself is good. It's made of a heavy duty plastic with a zip type closure for storage. So far I really like this potting soil. I'll update this review once I see how the seeds sprout and the seedlings grow.

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