Improvised emergency SIP? time sensitive.

Long story short.. 4 plants in square vivosun 3 gallon fabric pots. Promix HP with extra perlite. right now they are being watered to slight runoff twice a day. I have to be gone for about 36 hours for family emergency.
I have some rectangular containers that I can set the fabric pots in. My thinking is water the plants as normal right before I leave (in 2 hours) and put a couple inches of nutrient water into the containers and let the bag/promix suck it up. Sound reasonable or am I asking for root problem?

additional detail, the fabric pots in question are on the thick side which is part of what has me uncertain about this method.

Thanks everybody. The input was overwhelming and helpful.

I'd just feed them and leave them alone. You're welcome.

twentyeight.threefive said:

I'd just feed them and leave them alone. You're welcome.

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The plants in question will go from fully saturated to bone dry in 10 to 12 hours. 24+ hours of bone dry under a lot of light would not do anything good for them. I just ended up going ahead with my improvised solution. I guess we'll find out how we'll it worked late tonight when I get home. If I'd have had more notice I'd just have set my blumats up. Thanks for the input though!

I've only just seen your post.
I would set up some sort of capillary feeding... A quick fix, a basin/tray with a plank across it, drape capillary mat over the plank into a tray of nutrients then sit your plant on it and it will be fed until the tray empties.

Star Dog said:

I've only just seen your post.
I would set up some sort of capillary feeding... A quick fix, a basin/tray with a plank across it, drape capillary mat over the plank into a tray of nutrients then sit your plant on it and it will be fed until the tray empties.

Click to expand...

Definitely a more refined version of what I did! I've been very curious about capillary mats and I think I will definitely have to experiment with them. Thanks!

Update/conclusion.... It worked perfectly. The end.