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cactus soil diy

cactus soil diy Molly's Succulent Mix: Gritty Cactus Soil | Veryplants

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Description

cactus soil diy Molly's Succulent Mix: Gritty Cactus Soil | VeryplantsQuick 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.

  1. 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.
  2. Water until liquid runs clearly out the drainage holes. Don't dribble. Soak.
  3. Discard any water in the saucer. Do not let the pot sit in standing water.
  4. 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.

→ Read the Succulent & Cactus Care guide

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 →

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CRBMD
Alexandria, US
★★★★★ 5
A lightweight hose that performs like a heavyweight!
The Copper Head Expandable Garden Hose is my favorite hose to use when doing garden wastering chores. I am an avid gardener and need a sturdy hose that is portable. We have many gardens on our rural property, but no irrigation, so watering is essential in the summer droughts we’ve had lately. I like that the water drains out quickly and completely, which allows me to fill up containers until the hose is empty so we don’t waste the water. The outer cover is extremely durable, feels quite thick, so even if it catches on a branch, I don’t worry about the cover getting ruined. Also, the spray head and swivel connection make moving around while using the hose very easy. I can turn off the spray head with one finger and easily select another spray pattern as needed with the easy to use dial design. The hose does not tangle or kink, which also makes it easy to use. Even when the hose is filled with water, I am able to move around the gardens with ease. When I am done using the hose, I can put it in a reusable grocery bag to carry it in the garage and store it. I would not leave the hose full when done using it, nor leave it in the sun. When I am finished for the day, I drain it, put it in the bag, fold over the top, and leave it in the shade or put it in the garage so that it will not deteriorate. It’s my second year using it and it’s still like new. I love this hose! I recently bought two more 50 ft. ones!
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Reviewed in the United States on May 18, 2026
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The Prodigal Carpenter
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BEST HOSE I EVER BOUGHT
I sure hope this thing lasts because it is simply the best garden hose I EVER bought! I’ve used it a lot in the 2 months since buying it, watering my plants, filling grow boxes, attaching to my pressure washer, etc. It does not kink, not even once. The pocket pivot connector is a nice touch, and the spray nozzle works great without the usual dripping of cheaper models. The hose expands as soon as you turn it on, so be ready. I bought the 100’ and got a $30 discount at the time. $69 "all in" is still a lot of money for a garden hose, but I am super pleased thus far. When you turn the water supply off, the hose will continue to spray for a couple minutes while it contracts, but again, it does so without tangles or kinks. Super lightweight and very easy to handle with a strong water flow. Only time will tell on durability, but thus far there’s been no “fraying” or signs of wear from dragging it across my driveway or rock landscape. I’ll re-evaluate after a season but I’m ready to replace my other hose with one of these. For now, I love it and highly recommend.
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Reviewed in the United States on May 27, 2026
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Makin sawdust
Pawtucket, US
★★★★★ 4
I am hopeful this new version of Pocket Hose is better built than earlier versions!
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Reviewed in the United States on April 15, 2026
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Julia
Houston, US
★★★★★ 5
love the pockets hose!!!
Style: Ballistic, Size: 75 FT
I usually don't do reviews but the pocket hose is so great I had to . It works so well, flexible , not heavy or cumbersome to move about as it curls back to water spigot when water turned off after using!!! Fun to watch I want to throw all my other hoses out !! I am elderly and this is so light and easy for me to use. I first saw as an add on TV and was skeptical! So happy I gave it a try!! We now have2 -5oft and 1 -75 ft. Try it you'll like it !! I promise!! \
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Reviewed in the United States on May 31, 2026
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Dallas, US
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Not as durable as advertised.
This hose is not as durable as advertised. First time I used it and didn't work. The hose itself was slit or had some other issue with the band inside because water leaked through the hose and did not reach the nozzle. Update: I wrote to the manufacturer of the hose, Pocket Hose, regarding the defective hose. On May 30, 2026, they agreed to replace my hose under their warranty. On June 2, 2026, I received an email from them stating they recently updated their warranty policy to 30 days, and my notice was outside their 30-day warranty period. I then received an email from the seller of the hose, Bulb Head offering me a full refund on the hose. Something the manufacturer would not do. All I wanted was a replacement. I am changing my rating for the seller to 5 Stars for standing behind the sale of their product. Thank you, Bulb Head!
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