You can start a celery plant using the leftover celery stump. The problem I ran into was that I rooted the celery during winter and it too cold to move the plant outside. Even at my sunniest window, the plant died. I started rooting some more stumps at the beginning of April 2013. At the beginning of May I planted them into a huge pot outside and they seem to be doing well.
The middle of March is the time to start seeds inside for cool weather vegetables such as cabbage, broccoli and cauliflower. Don't start other seeds yet-- Click back to the story to find out why and get more tips from Lockwood's Greenhouses in Hamburg.
You can plant spinach and lettuce seed directly into the ground or a planter in April (in Western New York) as soon as the ground can be worked. You can plant lettuce every two weeks to get a continuous crop. It may not like hot summer weather, but if you keep it well watered and a little bit shaded, it will grow.
Cut the bottom off a plastic pot to contain invasive plants & bury in the ground. I have been doing this for a few years & works great for containing plants that tend to spread, but that I still want to plant in the garden. This also works good for planting a plant in an area that tends to get filled with roots etc. from other plants. I will use a larger pot so that the plant can spread it's roots and grow deeper roots, but keeps other tree roots from choking out the one I planted.