ok,
so ... there were concerns that the hydrogel would absorb water, but not readily return it to the soil/root system.
I did a little experiment, putting a kitchen towel on top of it and had the two of them fight for water ;-)
as you can see, there seems to be plenty of water available to be absorbed by the kitchen towel - the towel is dripping wet as you can see from the last couple of secs of the movie. So at leas when the hydrogel (HG) is really wet it provides good amount of watering, and releases it without any hassle.
Also, the amount of hydrogel that you see in the video and pics (above) is from one!
diaper ... right, thats about 3lb of wet hydrogel !
My guess is that this is enough to populate (in a 50:50 mix) something like 300-500 germination cells or (guessing) 100+ solo cups - again, this is one diaper
NEXT STEPS:
1.) I will be having sitting the HG in the sun for the whole day - its still rather hot and dry here - so lets see how fast things go south ;-) ...
2.) I will be repeating this for a couple of days until the gel gets noticable dry and then redo the kitchen-towel experiment - just to have them fight again for the remaining water
3.) would be interesting to know if the HG in its pure form serves as germination medium or if nutrients need to be added (I guess so - would appreciate your thoughts/opinions here, esp. on what nutes to add)
4.) would be interesting to mix HG and some kind of germinating soil and see how it performs and determine viable/optimal mixes
I would appreciate if anybody could help with step 3 and 4 as I dont have a great deal of neither seeds nor growing space to come up with 10 or so extra plants
This could cut us some leeway to take off for vacations for a couple of days without finding all your seedlings dead after a couple of days
thoughts and opinions are highly welcome?
thx,
Al "I never thought a make a vid of some gel drying" B.