Is Agway Pine Bark Composted bark or uncomposted?
6 years ago
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Fresh bark fines vs semi-composted bark fines vs well composted
Comments (17)Raybo, That is the same stuff I tried to grow in and make the 511 mix with last year. When I bought the stuff I asked for the oldest bags they had. Plus I let it age for another month or two. I think that this stuff has too much 'sap wood' in it if you will to be effective as a main ingredient in the 511. I called Earth Gro a few days ago and they couldn't tell me exactly what was in the Earth Grow bark fines stuff. However I'm pretty excited about some stuff that I found at Summer Winds thats called bark mulch made by Redi Grow who is out of Sacra-tomato. They were able to confirm when I talked to them a few days ago that it is 100% fir bark which is as good as pine bark. The only set back about this product is that it is 1/4"+ in size. I opened a couple bags yesterday and it seems to be very close to the size of the stuff from Earth Gro. Anyway I'm gonna give a few bags of this stuff a go in some pots and go from there. Wish me luck! Damon...See Morehow to compost pine bark
Comments (9)I thought the bark needed to be composted so as not to negatively effect the nutrient balance and/or drainage. The composting or not composting is not important. Particle size is what is important. The idea behind partially composted bark is that much of it is of a small particle size. The smaller the particle size the more water it can hold and the less oxygen. For annuals and water pig plants this is very suitable as it will retain ample water while still providing top notch aeration for a season or two. For longer term plantings we don't want the smaller sizes, but larger. The idea is the larger the pieces the more aeration and less water retention. This means favorable aeration is maintained longer. The larger particles would go into the gritty mix and be suitable for 3+ years. For those wishing to stretch their dollar as far as possible I offer these thoughts: A commercial, peat based mix is ideal in a deep (but not shallow) container for 1 season, but can probably be reused for 2 without a serious decrease in plant performance (results will vary widely depending on the mix, some aren't even suitable for one season). A bark based mix of smaller particle size is ideal for 1-2 seasons, but can probably go 3 without a serious decrease in plant performance. Not a good choice (after year one)for plants in very shallow containers or those with a known aversion to 'wet feet'. A gritty mix consisting of 2/3rds inorganic media that will never break down and larger particled organic stuff that will, can last almost indefinitely without a significant decrease in plant performance. For super picky situations such as very shallow containers with plants that can't tolerate wet feet at all, limit to 3 years of use. It all boils down to particle size. The smaller the mean particle size the more water the mix will hold and the less oxygen it will hold. At one extreme is clay sub soil. Super tiny particles. Too small for the eye to see individual particles. At the other end would be 1/2" rocks. In the clay sub soil put into a container almost nothing would survive. Too little oxygen, too much water. In the container filled with 1/2" rocks almost nothing would survive. Too little water and more than enough oxygen. The idea is to find a balance between the two and to choose materials that will resist break down/compaction for at least as long as the plant will have to be in the media....See MoreComposted vs. Uncomposted Bark
Comments (3)If you can find them, aged pine bark fines are the best choice for the 5-1-1 mix (bark/peat/perlite). The finer particles will hold more water, and aged bark will tie up less nitrogen than fresh bark. If you're unable to find aged bark and you're concerned about water retention, you might consider increasing the amount of peat in the mix (4-2-1, for example). You can work around any potential N immobility by increasing fertilizer rates (if necessary)....See MoreWhere's the uncomposted pine bark for Al's Gritty Mix in Dallas, TX?
Comments (3)I used it for 5:1:1; as I understand it, the gritty mix is a bit more particular about particle size. I just used an old fan cover with slots about the right size to filter it and I was able to use most of the bag. But I was also a bit less demanding since my "pot" is 8'x'4'x16.5". :)...See More- 6 years ago
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