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Hello!
To keep cost down on bags Ive been pondering on the idea of using Layflat poly tubing and then either puncturing around the bag in several places or perforating the bags myself (board of pins and a paint roller) – like the bags Blaak supply. So my question is have you seen much difference in production using perforated bags compared to puncturing them?…or are filter bags the better option?
Lee
Hi Lee,
we’ve always just used proper mushroom cultivation bags as they’re optimised for the right amount of air exchange and for the cost (35p – 50p/bag). I believe the cost is worth it after all the effort and spawn cost which already goes in to producing each bag.
However, I can understand that when starting on a small scale, keeping costs down is important so it’s natural to look for ways to make bags yourself.
I guess the best approach would be to buy a small amount (maybe just 10 or so) of the filter batch bags and grow some in those, alongside some bags that you make yourself – and then compare rate and health of the resulting mycelium growth.
I’m sure you can get good results making them yourself – it may just take a bit of trial and error to get the right amount of holes and the right size in order to reach an optimium point comparable to off the shelf filter patch or micro-perforated bags.
best wishes, Adam
Thanks for the advice Adam, i think i will stick with filtered bags for now then and look at making my own in the near future to see if its worth while.
We’re gearing up to do our first growing test. We’ve sourced a spawn supplier who will sell us a small supply of spawn for the test. So, question: what size bags would be good for this test, and what’s the best way to seal and hang them? Also, can you keep spawn in a household fridge, is it the correct temperature? If anyone knows where to source bags in Toronto Canada that would help too! US exchange rate is killer.
Hi Rose,
welcome to the forum š
If it’s your first bags you may be best using smaller filter patch bags holding just 1-2kg substrate. These are the small 4T Unicorn bags which tend to hold around of just over 1kg substrate each and can be bought from ebay Canada:
You can just seal them with zip ties, string, paperclips of even tape if you like – or you can buy a bag impulse sealer if you start to do alot of them.
Spawn can be kept in a household fridge usually for up to a month if it is fresh – just try to make sure it’s not stuffed in next to lots of other items, to make sure there’s enough airflow around it keeping the temperature down.
Best of luck with the first bags – let us know how yo get on!
Adam
What weight/size do you normally place in each bag? I know that each bag should be about 50/60% full. I was just wondering if you regularly grow bags at 5kg, 10kg etc and what the maximum weight you have regular success is?Ā Or perhaps aa maximum bag width, 20cm etc.Ā Also, doesĀ it haveĀ an affect on the time it takes to colonise.
Lastly with the unicorn bags, it appears the holes in this type of bag aren’t filtered? Is that correct and does it have an impact on contamination
Thanks
Hi Leisha,
thanks for your note. We do grow in different volumes ranging from just under 2 kg per bag to 6 kg / bag up to 12 kg/ bag. We have success with all of these using mix from the course and use Unicorn bags for the 2kg only.
The largest bags of 12 kg would come close to 20 cm in width and colonise fine. This is more a result of the mix and whether the mix has enough access to air in the colonisation process. Only when overfilled or too dense would you get into trouble.
With regards your Unicorn bag question I am wondering which bags you are referring to? If you can let me know with a link that would be great.
Best wishes,
Eric
Hi Adam,
I just finished the course yesterday and am in the US. Ā I contacted a hydroponic supply store near me and they have black grow bags. Ā Do you think that they would work our should I stick with clear bags.
Thanks,
Bill
Hi Adam
These are the uniforn bags i was looking at http://unicornbags.com/store/product_info.php/cPath/26/products_id/72/osCsid/ba15c7996f95ae817581e0ea854533fc
however since posting this, they responded to me with a quote for shipping to Australia which was one and a half times the cost of the bags! Don’t suppose you have any other suppliers for unicorn bags that you could suggest? Having had a look on the supply list I couldn’t actually find unicorn bags on any others.
Thanks
Sorry I just reread you reply, you only use unicorn for 2kh bags? what sort of bag do you use for the 6 and 12kg?
These are the sort I have been currently using but only hold about 4kg without overfilling and compromisingĀ on amount of airĀ in bag.
http://www.aussimushroomsupplies.com/index.php?route=product/product&path=97&product_id=150
They do have larger bags but they then become quite wide and am concerned it may be a problem.
Hi Leisha,
You could try the jumbo bags your current supplier stocks: http://www.aussimushroomsupplies.com/index.php?route=product/product&path=97&product_id=614 These look to be a little bit bigger than you currently use and I’m sure would be fine for air exchange if you didn’t overfill them.
Or possibly worth a try with their column bags too: http://www.aussimushroomsupplies.com/index.php?route=product/product&path=97&product_id=614 These are similar to the ones you were looking at from Unicorn. At 30cm wide, they are a little on the big side and could potentially have problems with enough air exchange to the centre of the substrate, but may be worth a try.
Alternatively you can make your own, which is what we’ve started doing recently. You can buy rolls of layflat poly tubing, like this (UK seller):
https://www.polybags.co.uk/shop/standard-layflat-tubing-7-15-wide_c1015.htm
Cut lengths of around 2-3ft, zip tie the end, and then fill with substrate and zip tie tightly at the top as well. Then poke a series of 1cm holes in the bag every 10-15cm around, before placing in incubation. We’ve found that tubing of around 20-25cm when flat (which becomes about 15-20cm when filled) is the ideal size.
Hi Bill,
although black bags can work fine, the main problem with them is that you can’t see what’s happening inside the bag, so it’s difficult to monitor spawn run and spot any problems with contamination or slow colonisation.
You may be best off making your own using the method I just mentioned to Leisha above.
best wishes,
Adam