How many members are using Al's gritty mix ?
meyermike_1micha
15 years ago
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justaguy2
15 years agotapla (mid-Michigan, USDA z5b-6a)
15 years agoRelated Discussions
My first batch of Gritty mix - Al, how does this look?
Comments (16)1) If the plant has leaves, you shouldn't bare-root it. Just tease the roots apart a little, being careful not to let them dry out - and pot it. If it doesn't have leaves, go ahead and remove the soil before you plant. 2) It's helpful if the soil is a little damp when you make it. Beyond that, it doesn't matter much if it's damp or dry, but you don't want it wet. It's too hard to work with. 3) No problem I can see. 4) Wait about 2-3 weeks before you fertilize. Then use something like FP 9-3-6 or either of the 3:1:2 MGs, like 24-8-16 or 12-4-8. Let me know if you need that translated. By the looks of the soil you made though, you're pretty well-schooled. ;o) 5) I can't tell you how often to water, Nik. You'll have to figure it out for yourself. It will partially depend on how deep the roots of your plant go - how large the root mass is. If it goes deep into the container, you'll need to water much less often than if your plants are small & the roots only go down a couple of inches. After the plant is well established, you might want to occasionally withhold water until you see some sign of wilting - just to get a handle on how long the plants CAN go between waterings. You CAN over-water, but you have to work at it. Use a dowel pushed deep into the soil. If it's wet/cool, withhold water until it comes out dry. Al...See MoreUse Al's Gritty Mix or river silt?
Comments (17)Pretty nifty planter and setup. Love it. Your planter setup determines how the roots will behave. Roots behave differently between raised bed or container. Roots typically like to grow out, not down. In a big enough raised bed, plant roots have room to spread out. In a pot, they try to grow out, but begin circling after a while once they begin to outgrow the pot. If it's easier for your roots to circle while boxed in then grown down or under the planks, your planter will act like a pot. After a few yrs of circling roots, your plant health will degrade. If the roots spread out below the wood and deck into the surrounding soil, your setup is acting more like a raised bed. I think you need to get used to the idea that no soil setup is permanent for anything smaller than a tree. Whether in a pot or bed, over time you need to amend, condition, replace soil etc for the plants to thrive. Here's what I would do. I would go to nurseries in your area, not big box, and find the best store-bought bagged planting medium you can find. Not cheap peaty miracle-grow crap. I would also not go through the effort of making Gritty or 5-1-1. Find a premium bagged product with maybe some peat, some bark, but a large amount of perlite or inorganic matter. Something with the majority of particles feeling a bit grainy or gritty to the touch, but not so shreddy. I would remove all your miracle grow soup and replace with something like this. Then I would buy a new bag of it each spring and top off the planter with fresh mix to replace what has degraded. If you can't find it, I would shovel in some local top soil, amend it with some organic matter and just call it a day....See MoreIs Al's gritty mix or 5-1-1 mix really any better than other mixes?
Comments (32)@Nil13 made reference to the Whitcomb 311 mix, which is an earlier historical attempt to create a more coarse potting soil for container plants. I think it is extremely helpful to read a document written by Carl Whitcomb that explains how he came on this formula by accident. Essentially what happened is he accidentally left nine test pots under a bench and everyone forgot they were there. They had successfully nearly killed all of their test plants by watering in a normal potting soil mix and the unwatered plants started to do very well. What I have started to realize is that any plant can do well in many different soil mixes, if you are able to carefully control the watering. This explains why so many people on this forum claim gritty mix is not as good for their succulents as their (fill in some random horrible soil with lots of small particles) mix. Inevitably those people are growing their plants indoors. They have enormous experience with their plant type and they know exactly when to water the plant. So that is the case of a very skilled gardener compensating for a very bad soil. What gritty mix does for me is let me grow succulents outside in very abusive weather conditions, without the plant dying. A plant can get a week of rain and it will still drain well. During Summer, gritty mix will tolerate a bit of overwatering, although you still really need to pay attention to not overwatering. Whether you make your 511 mix with perlite/peat, or with two parts Turface, or with lava and pumice, is probably in the big picture not going to be the deciding factor in whether your plants grow well or not. Success can be add with any of those mixes because the size of the particles allows the roots to breathe and prevents capillary action of water from bring the perched water table to the top of the pot and drowning the roots. Fine-tuning how you make 511 is a question of matching the plant type to the moisture retention of the soil and to the watering habit and climate exposure. Any 511 variant is going to do better than almost any commercial potting soil because of the larger particles used in the majority of the mix....See MoreFicus Lyrata Re-Repot into Al’s gritty mix???
Comments (13)Hi Al, I’ve finally had the opportunity to reply with an update and wanted to thank you again for taking the time to share your knowledge and help explain the process and reasoning behind choosing a particular growing medium. I am always fascinated by the science of things and am looking forward to my ficus lyrata breathing easier. July 31 was repot day. I gathered all of my 1.1.1 gritty mix supplies, screened & rinsed the turface mvp & manna-pro poultry grit, & proceeded to make a huge mess trying to coax the zoo med repti-bark into smaller pieces using a 3-cup ninja food processor - - neither a quick nor easy endeavor. Some pieces did get smaller but not enough to justify the amount of dust that landed all over my kitchen, so the size of my bark is what it is. I want to stress that a dust mask is imperative for anyone attempting this, especially indoors, and also to note that I did not see any discernible difference in bark size between the larger (24 qt) & smaller (4 qt) bags (see picts below) Next I bare rooted what I thought was 1 plant and discovered that I have 2 separate plants - - and I did wind up doing some minimal root pruning after rinsing off all the existing soil. After drilling additional drainage holes all the way through the bottom of the attached saucer, I repotted both plants back into the same original glazed pot as I did not have the opportunity to get an all clay pot, nor did I have a 2nd pot available to repot separately so they will continue to be bosom buddies, at least until next year. In the hopes of lessening the weight of the pot and more importantly, the perched water table, I placed 4 small empty plastic water bottles at the bottom of the pot and added a cotton string wick through the main center drainage hole to help keep a check on moisture levels. One other thing to note is when I originally posted on July 25, there was no visible growth activity - the brown pod (for lack of a better word) felt dry, crispy & empty, but to my surprise, right after the repot, I noticed that there was in deed some growth activity taking place. I only hope I did not jeopardize the emergence of new baby leaves with this root running & repot! As luck would have it, I have to go out of town for 2 weeks and need to leave explicit instructions for my boyfriend who will be caring for my plants while I am away so I do have a few questions: ~ How long should I keep the plant in the shade or is it ok to keep it in bright light but with NO direct sun? Right now it is behind a UV solar blind and sheer linen curtain which creates a shady environment. ~ When can I introduce it back into some direct sunlight? ~ Should I water everyday until the roots acclimate & re-establish themselves in the gritty mix? What is the best watering schedule for now? ~ When would I start adding foliage pro 9-3-6 to the mix & should it be the production or maintenance amount? Many thanks to Al and all the other forum members for all the advice. I will update once I am back from my trip with any changes - - hopefully they are all positive ones. **having trouble positing picts so will try to add in separate post...See Morepuglvr1
15 years agojodik_gw
15 years agofilix
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15 years agojeannie7
15 years agotapla (mid-Michigan, USDA z5b-6a)
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15 years agowhgille
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15 years agoJXBrown (Sunset 24, N San Diego County)
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