I have Canna Plants?

I bought these for the first time this Spring. They have been left in the pots and have bloomed and rebloomed. I need to know what is meant by "dead heading " ? Also I have found small pods that are fully of small black seeds. Can these be harvested and replanted in the Spring. If so how do I go about keeping them over the Winter. Do they need to be dried out ? I could just put them in a jar but I think thry would mold. The plants I bought were very expensive so if I could use these seeds that would be great. If they are usable then how do I start them indoors next Spring. Thanks for all answers...

I have Canna Plants?
Dead heading is cutting off the exhausted blooms. The pods are filled with seeds harvest them just before they 'pop'. You can do that by putting a small paper bag over the pod after the flower is done, put a twisty or a rubber band on the bag to hold it and catch the seeds. Do not dead head until the pod pops. Check the in the bag every two or three days. the paper bag will allow air to circulate and if you take it off once in a while it will not mold. When the pod does pop keep the seeds in a pie pan, saucer, unused ash tray [one thing good you can use it for], or anything flat with a small lip. When the seeds have been in there for a week or so they should be dried enough to put them in a white envelope and label it species and date. Good luck
Reply:Sorry but I can't help you.
Reply:You don't say where you are. In zone 5 cannas are annuals. They MUST be dug up in the fall and stored. You need not worry about harvesting seeds. When you take the plant out of the pot there will br 5X as many tubers as there were when the plant was started. There is no need to start them in the spring. If you have stored the tubers correctly, you will see new growth on them. When your weather is OK, just replant the tubers. Sorry, I don't know how to care for them in warmer climes.