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Using polyacrylamide crystals in SFG? Toplef10Using polyacrylamide crystals in SFG? 1zd3ho10

Hello Guest!
Welcome to the official Square Foot Gardening Forum.
There's lots to learn here by reading as a guest. However, if you become a member (it's free, ad free and spam-free) you'll have access to our large vermiculite databases, our seed exchange spreadsheets, Mel's Mix calculator, and many more members' pictures in the Gallery. Enjoy.

Using polyacrylamide crystals in SFG? I22gcj10Using polyacrylamide crystals in SFG? 14dhcg10

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Using polyacrylamide crystals in SFG?

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Using polyacrylamide crystals in SFG? Empty Using polyacrylamide crystals in SFG?

Post  JeanneRamick 3/16/2012, 2:04 am

Has anyone ever used polyacrylamide crystals their SFG? (sometimes called Watersorb)

Sold my house and moved into a Condo, so my SFG needs to be moved to a cement patio this year. Since I have to move it, I'm going to elevate it to ease the stress on these old joints.

The patio faces almost directly South (a tiny bit West, too) and gets a lot of sunlight each day. Work keeps me away from about 7am - 6pm weekdays so I have concerns about the heat drying out an elevated SFG.

While mucking about on the internet, I found a blog post about someone in Canada using those
polyacrylamide crystals for non-food plants in her SFG. She had concerns about plants absorbing by-products as the crystals break down over time (as they're supposed to) However, I read on another site that these crystals break down into naturally occurring substances.

Has anyone ever utilized a product like this and what was the experience like? Does anyone else have thoughts on this topic?

Jeanne


Last edited by JeanneRamick on 3/16/2012, 2:05 am; edited 1 time in total (Reason for editing : spelling)
JeanneRamick
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Post  shannon1 3/16/2012, 2:19 am

Using polyacrylamide crystals in SFG? 654548 Jeanne,

With the magical Mel's Mix you realy don't need anything else to retain water the peat and vermiculite does the trick. I live in hot, hot, florida. Did I say it was hot here? Compaired to a box I use organic potting soil in I have to water the MM much less. As Mel often points out SFG needs only "20% of the water as a traditonal row garden" I think that only applies when you use Mel's Mix. Have you read the ANSFG book yet?
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Post  JeanneRamick 3/16/2012, 3:31 am

@shannon1 wrote:With the magical Mel's Mix you realy don't need anything else to retain water the peat and vermiculite does the trick. I live in hot, hot, florida. Did I say it was hot here? Compaired to a box I use organic potting soil in I have to water the MM much less. As Mel often points out SFG needs only "20% of the water as a traditonal row garden" I think that only applies when you use Mel's Mix. Have you read the ANSFG book yet?

Thanks for the welcome, Shannon and thanks for the input on your HOT location. (Got the hot part loud and clear Smile )

Yep, I do have the ANSFG book and have had my 4x4 SFG (as well as some individual boxes for tomatoes) with Mel's Mix for 3 years now.

I agree that my SFG with MM needs far less water than an ordinary row garden would. However, my concern is that instead of being on the ground out in the open and getting partial shade ... the new placement of my SFG will be UP off the ground (causing potential extra windage, it will now have full-sun almost all day and be almost up against the building with the reflected heat. I think all three of those factors will increase how quickly the drying will occur.

Just have memories from years ago when I tried "container gardening" of tomatoes on an apartment patio. Those white buckets just about roasted from all-day full sun and they would need water almost every day when I got home from work. The combination of soaking the soil after work then drying out during the day caused blossom-end for the poor tomato plants. It was pretty much a nightmare ... one that I don't want to repeat after having 3 years of successful SFG!

Jeanne
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Post  camprn 3/16/2012, 6:10 am

Shredded bark mulch would greatly reduce the evaporation of moisture from the Mel's mix in the garden bed. I like the shredded bark, because it is readily absorbent, isn't likely to shed as much water and I can pull it away from the growing medium when I need to. It is also not terribly expensive, will eventually decompose without adding any weed seed and doesn't draw much nitrogen out of the mix.

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Post  walshevak 3/16/2012, 9:04 am

This is one time when I would actually encourage a deeper framework, an inch or two more MM and space for mulch. And possibly a light shade cloth.

I have only used the crystals in flower pots, but it did seem to help in them. But watch out, when fully soaked, they expand push the soil out of the pot.

Kay

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Post  shannon1 3/17/2012, 3:36 am

@JeanneRamick wrote:
I agree that my SFG with MM needs far less water than an ordinary row garden would. However, my concern is that instead of being on the ground out in the open and getting partial shade ... the new placement of my SFG will be UP off the ground (causing potential extra windage, it will now have full-sun almost all day and be almost up against the building with the reflected heat. I think all three of those factors will increase how quickly the drying will occur.

Jeanne
I see where you'er coming from my boxes are table tops in full sun. If you want to see some of my garden pics click this link http://www.flickr.com/photos/_sfgphotoside/sets/72157629601436557/ they realy do just fine, but we do have the humid air down here.
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Post  JeanneRamick 3/17/2012, 10:33 am

Very nice pictures, Shanon. The one of your garden in a dew drop looks professional enough to be made into postcards or get a page in a gardening calendar!

Still haven't decided about using the crystals.
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Post  camprn 3/17/2012, 4:19 pm

I was thinking of putting a layer of new disposable diapers in the bottom of some of my flower containers to help with moisture retention. I will let you know how that works out... affraid

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43 years a gardener and going strong with SFG.
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There are certain pursuits which, if not wholly poetic and true, do at least suggest a nobler and finer relation to nature than we know. The keeping of bees, for instance. ~ Henry David Thoreau

https://squarefoot.forumotion.com/t1306-other-gardening-books



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Post  JeanneRamick 3/17/2012, 5:12 pm

@camprn wrote:I was thinking of putting a layer of new disposable diapers in the bottom of some of my flower containers to help with moisture retention. I will let you know how that works out... affraid

Now that's an interesting idea camp rn ... would you be wetting the diapers first, so you know exactly how much expansion to expect? Just thinking of Sharon saying some of her plants were heaved out when the crystals expanded.

Since I have to move my SFG this year, I'll have the frame empty again ... maybe a layer of disposable diapers in the bottom. before putting the MM back in would be a good idea.
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Post  shannon1 3/18/2012, 3:09 am

@JeanneRamick wrote:Very nice pictures, Shanon. The one of your garden in a dew drop looks professional enough to be made into postcards or get a page in a gardening calendar!

Still haven't decided about using the crystals.
thank you Jeanne my brother's only comment was he would like it more if it were more tear drop shaped LOL He's a painter and a harsh critic.
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