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Description
soak and dry method succulents Molly's Gritty Mix for Cactus & BonsaiQuick answer: what is Molly's Succulent Mix? For: succulents, cacti, bonsai, Haworthia, Echeveria, Sedum, Jade, and any arid environment plant. What's in it: high mineral gritty blend of pumice, lava rock, and crushed bark. Low organic matter by design. Why it works: succulent roots are built to drink fast and dry out fast. The gritty structure drains in seconds and holds zero standing water, so roots don't rot. Pre rinsed and pH balanced straight
Quick answer: what is Molly's Succulent Mix?
- For: succulents, cacti, bonsai, Haworthia, Echeveria, Sedum, Jade, and any arid-environment plant.
- What's in it: high-mineral gritty blend of pumice, lava rock, and crushed bark. Low organic matter by design.
- Why it works: succulent roots are built to drink fast and dry out fast. The gritty structure drains in seconds and holds zero standing water, so roots don't rot.
- Pre-rinsed and pH-balanced straight from the bag. No salt flush required.
- Bonsai-safe. The grit profile matches what serious bonsai growers blend by hand from akadama, pumice, and lava.
More plant-specific guidance: Ultimate guide to growing succulents indoors, Potting soil vs potting mix.
Succulents and cacti evolved in arid, mineral-rich environments where water moves through gritty substrate in seconds. Their roots are built to drink fast and dry out fast. Standard potting soil holds moisture for days, suffocates the roots, and rots them from the bottom up. The fix is a high-mineral, low-organic, gritty mix.
Molly's Succulent Mix is engineered to mimic native desert and rocky-slope substrates. A blend of pumice, lava rock, and a small amount of organic matter that drains in seconds and forces the soak-and-dry watering rhythm succulents need.
The gritty-mix philosophy
Most "succulent soil" sold at garden centres is regular potting soil with sand mixed in. That's not what these plants want. The right mix is roughly 70% mineral aggregate (pumice and lava rock) and 30% structural organic (coir, charcoal). Water hits the surface and runs through within seconds. Roots get a brief, intense drink, then dry conditions for the next 1 to 2 weeks. That's how succulents stay alive in pots.
What's in the bag
- Pumice (volcanic, lightweight): the mineral backbone. Holds a tiny amount of water inside its porous structure, but lets the rest drain freely.
- Lava rock (red lava): chunky drainage and heat retention. Roots love the warmth differential it creates.
- Coir fiber (small percentage): just enough organic to retain a little humidity and prevent the mix from drying to a brick. Not enough to compromise drainage.
- Horticultural charcoal: filters salts from tap water (succulents are surprisingly sensitive to mineral buildup).
- Calcitic limestone (trace): buffers pH to the slightly alkaline range (6.5 to 7.5) most desert succulents prefer.
Low peat content, no worm castings (succulents don't want a nutrient flush), no commercial fertilizer. The whole mix is intentionally lean.
Plants this is for
Designed for succulents and cacti:
- Echeveria, Sedum, Crassula (jade), Sempervivum: the classic rosette succulents.
- Haworthia, Gasteria: they prefer slightly more shade but want the same gritty drainage.
- Aloe (vera and others): medicinal succulents, this mix prevents the rot they're prone to in heavier soils.
- Most cacti: Mammillaria, Echinopsis, Opuntia, San Pedro, golden barrel.
- Lithops (living stones): require fast drainage to stay alive year-round; this mix is well-suited.
- Bonsai with high drainage needs: juniper, pine, and certain deciduous bonsai work well.
- Caudex plants: Adenium, Pachypodium, and other swollen-stem species that need fast drainage at the base.
Not for: tropical "succulent-looking" plants like Hoya, Christmas cactus (Schlumbergera), or Easter cactus, which actually prefer humidity-retaining mixes. For those, use Molly's Aroid Mix.
Watering with gritty mix
The right rhythm: soak and dry. Water deeply, then wait until the mix is bone-dry before watering again.
- Wait until the top 2 to 3 inches feel completely dry. For most succulents in standard 4 to 6 inch pots, that's every 10 to 21 days indoors.
- Water until liquid runs clearly out the drainage holes. Don't dribble. Soak.
- Discard any water in the saucer. Do not let the pot sit in standing water.
- Wait. The plant will let you know when it's thirsty (slight wrinkling of leaves, lighter pot weight).
In winter, water roughly half as often. Most succulents go dormant or semi-dormant.
FAQ
Why is this so heavy compared to other succulent soil?
Because it's mostly minerals, not peat or coco coir. The weight is what makes it work. Light bag means light drainage, which is the opposite of what succulents need.
Can I use this for bonsai?
For tropical bonsai, no, they want a moisture-retentive aroid-style mix. For drought-tolerant bonsai (juniper, pine, certain deciduous species), yes, this mix or a 50/50 blend with finer organics works well.
Will the mix break down or stay porous over time?
Stays porous. The mineral components (pumice, lava rock, charcoal) don't decompose. The small organic fraction breaks down slowly. Most succulents in this mix can go 2 to 3 years before repotting.
Should I add fertilizer?
Sparingly. Succulents are slow growers and don't need much. A diluted (~1/4 strength) cactus-specific fertilizer once during the growing season (spring) is plenty for most species.
Packaged in a heat-sealed resealable bag. New formula released April 2026, see the formula release announcement for details on what changed.
Related care guide
Watering, light, and repotting fundamentals for succulents and cacti.
Have questions? Read the Molly's Succulent Mix FAQ for detailed information on watering, repotting, and which succulents this mix works best for.
New: the complete soil guide
Not sure if you need cactus soil or succulent soil? They are the same thing. Read: Best Soil for Succulents and Cactus →
Not sure which mix your plant needs?
Take our free 60-second Soil Finder quiz → Diagnose the problem and get the exact Molly's mix and amount for your plant, plus 10% off.
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4.4 ★★★★★
Based on 156 reviews
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Product Reviews
★★★★★ 5
Eufy 30C is MARVELOUS!
Size: 07-C30
I purchased this Eufy 30C after 6 months of chiding from my sister, who has one. Eufy - where have you BEEN my whole life!
I have uneven saltillo tile floors in this home - I was sweeping floors nearly everyday just trying to keep the floors clean in this desert environment. On a daily basis, I just could NOT keep the floors clean enough for our barefoot habits. This vacuum cleans VERY well! I turn it loose every day - it cleans under furniture and beds, it cleans my lower-nap area rugs very nicely. I use the Auto mode (random cleaning pattern). The bumper is gentle on furniture legs and walls, the sweeper automatically goes into/out of baseboard cleaning - it cleans all along the walls! Most rugs I can leave in place and let the sweeper clean those, also. The few rugs that do get caught up in the brush, I just pick up before starting the cleaning. I have moved cords so they are permanently not in the way, so I only had to deal with those issues once. The suction on this vacuum is terrific - the combination of the spinning side brushes and the roller brush pick up everything. If the sweeper has been there, the area is spotless! It moves easily from floors to rugs. I normally run the sweeper as we are having breakfast - it is very quiet, although a little "rattling" as it moves across these saltillo tiles. I have used the daily programmed mode, but personally prefer to run it when I am "ready" (some rugs picked up). The vac does not ever seem to "miss" a room using this random pattern, and eventually it seems to get everywhere in a room. It just roams around the house and does it's thing - WITHOUT my help, and better job than I did on a daily basis!
I have a large, heavy-nap area rug that I prefer to run the regular sweeper on once a week rather than have my Eufy waste sweeping power there. I placed the boundary strips under the very edges of that rug to keep the Eufy off. This works most times although, occasionally, Eufy finds his way onto that carpet, anyway. I have to remind myself, but I do use an upright sweeper on all the rugs and a canister sweeper for the tile about every one to two weeks.
I empty the waste container everyday when cleaning is finished (I am always amazed at how much this sweeper "finds" and picks up!). I also clean the filters everyday with a small, battery powered hand vac (opposite the direction of airflow of the Eufy). This seems to remove the fine dust from the filter. I did purchase an additional filter set. Each week, I change the filter to a clean one, and wash out the used filter under running-spray tap water and let it dry. The filters are disposable pressed paper (and a small foam filter sheet that is also washable), but I have interchanged these two filters for 6 months and they are still working just fine. Emptying the waste container and cleaning/changing the filters is extremely easy and fast. I clean the roller brush of hair and carpet fuzz as needed.
I have contacted the company with questions and they were extremely responsive. I also had the brush guard replaced from the company without any issues or questions at all. Customer service was very nice. (I believe the uneven tiles just wore on a very small rubber piece and it eventually came off. Looking back, I really don't believe it affected the performance of the sweeper, or the brush guard, at all. If it happens again, I probably will not bother to replace it).
I cannot think of one dislike I have of this Eufy 30c. I believe the price was extremely reasonable for the excellent job it does. It has made a big difference in the attitude I have about this house as the one, most annoying, issue I had - seemingly constantly dirty floors - is now a non-issue. If this sweeper broke down tomorrow, I would have trouble getting another here fast enough!
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Reviewed in the United States on September 3, 2019
★★★★★ 5
Awesome robo-vac/mop with rotating mop head/no pads.
Size: E25 Black
I owned a Narwal Freo for 1 year and it died right after the warranty period was up. Tried replacing the battery but that did not fix the issue so I had to purchase another one. I noticed this eufy had high reviews and the 1 star reviews seemed to be just isolated issues so I purchased this one. Right away I noticed that the instructions/setup was much more simple. Second this one has a big wide mop roller on the front and after mopping I didn't see the mop streaks in circular patterns on the floor like I did with the Narwal as it had two rotating mop heads on the front so the single mop roller seems to be a better solution. Setup consisted of removing protective wrappers off of the tanks and base station, filling up the clean water tank, installing the detergent bottle and plugging it in. Next I downloaded the app and connecting the vac/mop to my network. This was SIMPLE to say the least. From there I could have just clicked clean on the app and it would clean the entire house. However, mapping gives you more flexibility when planning your cleaning ritual. You can define no go zones and clean rooms in any order you choose. I have a shedding dog so I have a separate robovac to clean up the dog hair prior to vac/mopping. This is a MUST with any robovac/mop combo as the dog hair on the floor will mix with the water and detergent and eventually prevent the mop from doing a good job. It will make a mess in the bottom tray of the base station too. I learned this through experience and reading all the one star reviews from customers. Robovac only cleaners last a LONG time. I had one that is still working great for over 3 years. All I had to do was replace the battery so it doesn't have to pause the job to recharge. So the mapping only took 4 minutes and it was pretty accurate. After the mapping I defined the room boundaries and renamed the rooms. Next I sent it off to clean and it did a FABULOUS JOB! No streaks and the floors are clean. The noise level is really low and more quiet than the Narwal. The other thing I noticed is it didn't use up much water to rinse the mop while cleaning. The Narwal used a lot of water and I was always dumping dirty water and adding fresh. I will always have a robomop and robovac as they save me so much time by not having to do this job twice a week. Connectivity to my network is excellent as it's in a location far from the router. This vac/mop is a good value for the money if IT LASTS BEYOND 1 YEAR. I will update this review as necessary and if it fails right after the warranty period I will report and downgrade this review to 1 star. These companies need to learn the importance of reliability and correct these issues. When I first reviewed the NARWAL it had almost a perfect 5 star review from all customers. After the year was up and it failed that star rating went down to 3+ stars. Most reviews reported their robovac/mop just died like mine did after the warranty period. I downgraded my review and reported the issue. I'm hoping this one will last because at the moment I am VERY satisfied with it like most customers. This model has been on the market much longer at the time of purchase so I would suspect if there were any reliability flaws they would have been addressed and corrected by now. We shall see. At this time I highly recommend!!
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Reviewed in the United States on April 13, 2026
★★★★★ 5
Excellent Robot Vacuum, Especially for the Price
Size: 11S, Size: 11S
I have been an iRobot Roomba buyer since 2007. My last Roomba bit the dust this month, and I did a ton of research before buying a replacement. I went with the Eufy for a few reasons: price point, cleaning power, quietness, and sleek design.
Price: Very reasonable. Almost reasonable enough that I'd consider getting another one for my second floor. For now I'll just carry it upstairs.
Cleaning power: This thing sucks... It's suction is much stronger than my Roombas have had. It picks up so much dust and pet hair. We do a full vacuum every other week with my Dyson, so I think of the robot vacuum as a supplemental vacuum. I was shocked at how much was in the dustbin after it's inaugural cleaning! The picture attached to this is from that cleaning. It also gets a ton of dust in the little dust filter. In one of the video reviews I watched, the reviewer said it didn't pick up anything in that dust filter... So maybe my carpet is particularly dusty, because it has a thick layer after each cleaning.
Quietness: I work from my home office, and this thing is quiet enough that I don't even turn it off during conference calls. This might be the thing I am most impressed with. My last Roomba was LOUD-- you couldn't even have a conversation with someone in the same room, let alone someone on speakerphone.
Sleek design: I love/hate this. It definitely looks modern and cool, and more like an art piece than an appliance, but it shows all my finger prints, and now I keep a glasses cleaning cloth nearby so I can rub it down. I suppose if I only use the remote and never pick it up, this won't be an issue.
A few considerations: I was hoping to find a robot vacuum that wouldn't eat my carpets' tassels, but I don't think that vacuum exists. I have only used the Eufy 4 times so far, and it doesn't always get its brushes wrapped around the long tassels, but it does sometimes. It seems to realize it sooner than my Roomba did at least. The Roomba would sometimes rip gobs of them off in a single cleaning. I try to tuck them under the edge of the rug and that doesn't seem to bother Eufy. It has pulled off probably 2 tassels so far.
The cleaning pattern seems pretty random. I saw some other vacuums that chart out complex maps of your home, and Eufy doesn't seem to do that. But, it doesn't seem to matter, because it still hits every spot in the rooms.
I'm a little concerned about durability. My Roombas ran for many, many years with easily replaceable parts. We'll have to see if Eufy has the same longevity.
All in all- I'm very happy with my purchase and definitely recommend it!
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Reviewed in the United States on September 7, 2018
★★★★★ 4
Robot Vacuum With Decent Cleaning but Too Much Maintenance
Size: E28
This robot vacuum was fairly simple to set up, and the battery life is actually pretty good. When it comes to cleaning, it does a solid job picking up dirt and debris, and overall the suction works well for everyday vacuuming.
However, the navigation and sensors really missed the mark for me. It struggled to recognize certain items around my house. For example, the mat under my cat’s food bowl kept getting caught because the vacuum didn’t detect it properly. It also had trouble recognizing furniture like my ottomans and would repeatedly run into them.
Another issue was how it handled different floor types. It’s supposed to be able to recognize surfaces like carpet versus hard flooring, but that didn’t always work correctly. At one point it even tried cleaning my carpet when it shouldn’t have. It also struggled with room detection and didn’t consistently recognize different areas of my home, even when placed directly in them.
I bought this hoping for more of a “set it and forget it” type of appliance since I work a lot and wanted something that would keep my floors clean without much attention. Unfortunately, that wasn’t my experience. I often had to redo the mapping or move the vacuum around so it could recognize spaces and objects properly.
There were a few positives though. The app is very helpful and easy to use, and the vacuum communicates clearly through notifications. It lets you know when things like the water level or cleaning bin need attention, which I appreciated. Maintenance like emptying it isn’t required very often either.
It’s also a little noisy. Not extremely loud, but it talks frequently and you definitely know when it’s running. Since I work third shift and sleep during the day, that was a bit frustrating.
Another issue was that it struggled to cross small entry thresholds between rooms. Even a small lip between rooms would sometimes stop it from moving into another space.
In the end, I decided to return it. While it does vacuum fairly well, the navigation issues and constant adjustments made it more of a hassle than a convenience. For the price, I expected something more hands-off, and unfortunately it required more attention than it was worth for me.
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Reviewed in the United States on March 11, 2026
★★★★★ 5
Great and Easy to Use!
Size: 11S
Background: I have a shedding dog, so I bought this in hopes that by running it every-day, it would pick up on some of the dog hair on the floor.
What I like:
-VERY easy to use.
-easy to follow instructions
-has a sticker on the bottom so if it ever stops and beeps, you can flip it over and it says exactly what the beeps mean (one beep means one thing, two beeps means another--which is SUPER helpful!).
-color on top clearly shows what mode it is in (blue-ready to go, orange-needs to charge, red-problem to fix-such as emptying the tray).
-very quiet. I can work on stuff with it in the room and it does not bother me at all (my dog also does not mind it).
-works great on white carpet and easily transitions from my living room to dining room (which has a slight bump).
-when its low on battery, it does not die where it is at, it just turns off the vacuum then finds the home doc and charges itself.
-just works really well. I run it everyday and I am impressed by how much stuff it gets (especially when it goes under things such as the couch).
-if it gets caught on a cord, it usually takes 5-10 seconds but then it stops the suctioning and moves away (releasing the cord or other item). However if you have a small cord you should put it up (and you should regardless, I just noticed it doing this a few times and thought it was neat, but I do try to pick up all cords).
What could be improved:
-nothing really in particular to this.
-It does not work well on anything black, but this is true for all robot vacuums. It sometimes gets stuck when it goes on the black carpet we have with the black chairs (I suspect because it can not detect them), but this has not happened often. My dog has a black mat for her food and water and it always bumps into it and spills the water, but again, this would occur with any robot vacuum.
-Also, make sure the doc is against a wall because otherwise it will move and never charge (self explanatory, but I did not do the first time and it kept trying to doc and was just pushing the doc around the floor).
-Finally, you do have to dump out the vacuum particles almost every time you run it (if you do a full circle/battery cycle). It is really easy to dump and beeps when it needs to be emptied. Again, nothing really negative, just something to note.
Overall, I really like this! It does a nice job cleaning up the dog hair and other things that get on my floor and saves me a lot of time not vacuuming daily. If you have a dog, I would watch them with this first before you use it. My dog was initially scared of it but sniffed it's "butt" and now they are cool and she does not mind it at all. Pleased with this product and would recommend! :)
**UPDATE**
On another note, Eufy has amazing customer service! I received an email from them addressing each of my "what could be improved" components with more information on the product. Very impressed.
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Reviewed in the United States on August 5, 2018