
Come May every year, I somehow get sucked into buying big and beautiful overflowing pots of annuals. Geraniums, petunias...anything that hangs will attract my eye. They run about $30 a piece sometimes higher for a well-developed pot. And I usually buy at least 2 of them.
I hang them anywhere I can see them easily from windows, stepping out my door or whatever. And they do well at first because I try to water them regularly. But when July hits, they are needing water at least once daily and they start looking bedraggled because inevitably I forget a day here, a day there (vacations are the worst!) Then, I spend the rest of the summer trying to revive them and by August, they're in the trash. Every year it's this same routine.
This year I decided to circumvent the entire fiasco and do my own. I have this polymer stuff that absorbs water and you put it in your pot, then it releases the water over time. It cuts down the frequency of waterings by up to 75%, and has worked well in all other pots I've used it in. So, in case you're as enamored as I am with the beautiful hanging pots, but also hate having to water them and then throw them away...here's your plan.
Go out and buy some good hanging pot plants - your favorites, the ones that you always buy already planted in pots. Get a nice big pot that will hang. Then, get yourself some polymer (here's a source - I haven't verified it but you can get them here:
Aquadiamonds. I got mine at the Home & Garden Show but I'll bet you can buy them at any old nursery. (all pics can be clicked on to enlarge)

If you're doing about a 4 gallon pot, measure out 1 tbsp of crystals into a large bowl and put 1 gallon of water into it and wait 2 hours. This is what it'll look like:

Then, you'll want to either stop up any holes in your pot or line them with plastic. The key here is no drainage. You want all of that water available for your plants only. There's no way they'll get too wet. It evaporates too quickly. Put about 3 gallons of soil into the lined pot.

Now, put about 1 gallon of reconstituted crystals into the pot with the soil.

And mix in well.

Now, you can plant all of your flower plants. Mine are young but have plenty of time to grow and will fill in nicely by even next month at the same time I normally buy the big pots. All of this cost me around $35 except I don't remember how much the crystals were. But they last forever. They come in packets of about 4 cups. I've had them for about 4 years and they're not even used half up.