deciding between the gritty mix and the 511
greentoe357
10 years ago
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fireduck
10 years agolast modified: 9 years agoOhiofem 6a/5b Southwest Ohio
10 years agolast modified: 9 years agoRelated Discussions
Gritty mixes, 511 and SWCs oh my! Newbie confusion
Comments (13)Hi, Jess! If you're going to be using more than a few small pots, ZooMed ReptiBark might not be the most cost effective way to go for the fir bark portion of your medium mix... it's roughly $5 for 4 dry quarts, which isn't much when you need to fill a number of large containers. It's about $8 for a medium sized bag of ReptiBark, which is 10 dry quarts. I use it for several reasons... it's convenient and available locally, no sifting or screening required, and I only need to make small batches of medium at a time. This spring, I'll need a lot more fir bark for the re-potting I intend to do, so I'll be heading north to Oak Hill Gardens, orchid growers, and buying their fine grade of fir bark in bulk. It's a 3 and a half hour drive, so I'll be stopping in next time we go north to visit the kids and grandkids. For someone who needs a larger quantity of medium, I'd direct them to look at orchid growers/greenhouses, mulch companies, bonsai growers, etc... in fact, in many cases, Al or someone else here that lives in your general area might be able to direct you to the right place(s) to look. It is my understanding that the 511 mix is generally used for short term plantings, like annuals or vegetables... and the gritty mix is used for longer term plantings, such as houseplants. The gritty mix contains a set of more durable ingredients, with the fir bark being the one item that will eventually break down. But a well made batch of gritty mix should be good for at least 2 years, and probably longer. I plan to keep my bulbs in it for about 2-3 years. I figure that will be around the time I get to re-potting. I will be using both mixes this year... I've heard such good things about the 511 mix that I'm really excited to give it a try! And I can already say that I adore the gritty mix! My bulbs and other plants couldn't be happier! :-)...See Moremodified Al's Gritty Mix and 5.1.1 mix
Comments (12)Around here the pine bark mix at Home Depot that works is the #302 Golden Trophy bags. I've been using this for the last 4 or 5 years. The only problem is that the #302 bags vary significantly from pallet to pallet. You need to check an open bag and make sure. If the chunks are small then the entire pallet is probably OK. If not the bags in the entire pallet is not usable. I got burned this year in my first buy and had to unload all the bags to someone's in ground garden (after a harsh winter I wasn't thinking straight :-). The bags were wet and the chunks seemed small after a quick inspection but after getting them home they stunk (which I heard was not good) and had a lot of sticks and bigger chunks hidden in them. A week later I went to a different Home Depot and found a pallet of perfect #302 pine bark and loaded up as many bags that will fit into the van. A couple of years ago the good pallet of #302 was behind a bad pallet which required me to climb over the bad pallet to get to the good pallet. The employees at Home Depot must have thought I was nuts. Last year I found #302 Golden Trophy at Menards with the same pallet to pallet differences but this year Menards doesn't seem to carry it....See MoreAfrican Violets in Gritty Mix or 5:1:1
Comments (49)Hi Al/plantcrazed/et. al., I thought I should come back and share some results from my "experiment" that I started at the end of April. The controls in my little trial were almost non-existent, but I think that actually makes the results more relevant to me and my growing conditions (and hopefully others will get something from this too). Back in April I got an order of leaves of 19 varieties of AVs. 14 came as pairs of leaves, so I decided to try growing them in different media. As I described in my post in mid-May, 14 leaves went in 100% vermiculite and 19 leaves in 100% turface fines (the smaller stuff left over after sifting for other mixes). The planting tray is an old kit I had leftover from years ago that has a clear cover for germinating/propagating. I had grand plans to carefully measure watering, leaf condition, first sign of roots/new leaves, etc. (like a good experimenter would), but the same day I planted the leaves my toddler ended up in the ER, kicking off several weeks of stress and doctor's visits, not to mention usual life events and adventures when working full time and caring for a small child. My plant care regimen settled in to, basically, watering when I noticed they looked dry. After the plantlets started to appear I took the covers off the trays, but otherwise I've just watered and left them under fluorescent lights and hoped for the best. Here are my results. Vermiculite 4 have plantlets, all of which seem to be growing alright 5 are mostly-dead or all-dead 1 formed a nice-looking plantlet that subsequently died, tho the leaf is still there and has roots 4 have roots but no sign of new leaves (yet?) Turface fines all 19 leaves are still alive 16 have multi-leaf plantlets 1 has a new leaf just beginning to appear 2 are strongly rooted and some gentle investigation revealed new leaves that just haven't broken the surface yet (I had just finished watering when I took this photo, which is why the turface shows wet and dry spots. This is what my usual watering of this tray looks like) A few other observations: the leaves of the new plants in the vermiculite are larger than any in the turface the leaves of the new plants in the turface are much smaller, but there are many of them, they are a strong green colour, and have a vital appearance (my experience tells me these are stronger plants than in the vermiculite) one variety was not in very good shape when it arrived. I considered complaining to the store owner about the quality, but see above re: bigger life priorities right now. That variety didn't survive more than a few days in the vermiculite. The leaf just rotted away. In the turface, it slowly rotted up the stem towards the leaf, but then rooted from the remaining piece of leaf and now has a lovely little plant growing: What these results say to me is that, for my horrible, neglectful treatment of these leaves, the turface was a better growing medium. I'm sure Al or Kevin/ewwmayo would have the correct terms for the properties of the two media, but I would say it seemed like the vermiculite contributed to a less stable environment - it went from a soggy mess when I watered to very dry, very quickly - and the turface was much more stable and allowed these poor things to survive despite my neglect. I've read some of the very lengthy threads about the properties of the various gritty mix ingredients and it makes sense to me that a plant like an AV that doesn't like to dry out but also hates being soggy would appreciate the turface's qualities of holding water but allowing for drainage and air movement through the medium. I think from now on the turface fines will be my preferred method for starting AV leaves (and likely other similar plants like episcias or begonias). I also moved two other AVs (a standard and a mini) into a modified gritty mix (1:1:1, but perlite in place of bark). So far nothing meaningful to report, though neither plant has bloomed and the mini seems to be happier than the standard. But with my neglect of the plants lately I don't think these results are meaningful, beyond saying that AVs can actually survive in the gritty mix even with an inconsistent and sub-optimal care routine. If there's anything interesting to report as these AVs continue to grow and I pot them up (likely into a gritty mix of some sort), I'll be sure to come back with an update. I would happily accept comments/questions/criticisms of my results, but please be kind in your criticisms of my care routine. I might be bad with my plants, but this little one is thriving: Thanks everyone, Melanie...See Moregritty mix vs 511 clarification...
Comments (4)The 5-1-1 is a better mix for your houseplants. You want that soil to be a bit more moisture retentive. I would reserve any gritty mix for the succulents, lavender and the sequoia. The Thrifty Sorb is fine. And you do not need to be precise about screening. I seldom bother and I've been doing this for years. I also don't bother to wait before using the mix......it really doesn't make any difference....See Moregreentoe357
10 years agolast modified: 9 years agoOhiofem 6a/5b Southwest Ohio
10 years agolast modified: 9 years agogreentoe357
10 years agolast modified: 9 years agoOhiofem 6a/5b Southwest Ohio
10 years agolast modified: 9 years agoNeed2SeeGreen 10 (SoCal)
10 years agolast modified: 9 years agogreentoe357
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9 years agolast modified: 9 years agogreentoe357
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tapla (mid-Michigan, USDA z5b-6a)