New idea for old jars

I grow some herbs in containers on my back porch, but it would be very convenient to keep some in the kitchen.  Some need to be replanted after they are zapped by winter freezes or fried by our summer heat.

The problem is,  my cat is an indiscriminate eater of houseplants, and I want indoor herbs for human consumption. I needed to find ideas to help me keep them out of reach of my curious kitty.  The internet seemed the natural place to look for catproof indoor gardening methods.

I found this idea posted by Tammy at CraftAwl.com (Complete with instructions):

It's a floating herb garden!

I've totally got to try this. 

I'm thinking I might use those water-absorbent polymer crystals instead of just filling the jars with water. I think they'd be more attractive than soil, and probably more convenient, since I'm pretty terrible at remembering to water things.  I haven't found any information on whether those are safe to use for culinary plants, though.