I had success with dahlias and begonias that I planted from started bulbs purchased in pots. Can I dig those bulbs and replant them next spring? Is it too late to plant tulips and daffodils?
It can get cold enough to freeze begonia bulbs in the soil, especially if they are planted in containers. It can also get cold enough to freeze dahlias in the soil, but they will survive most winters. Most serious dahlia hobbyists dig bulbs just to be sure. Other bulbs like ranunculus, calla lilies, canna lilies and gladiolus will not freeze and can be left in the ground.
I have a tub in which I planted ranunculus bulbs in the fall several years ago. They overwinter and bloom in the early spring. After they bloom, I plant annuals such as petunias and marigolds between the ranunculus plants. They produce color for the rest of the summer.
If stems do not readily detach from the begonia and dahlia bulbs when you dig them, leave a small piece attached. Let them dry in an area protected from freezing until the stems naturally fall off. I prefer to brush off loose soil rather than washing them. Moisture can cause bulbs to rot.
Bulbs should be dry, but not so dry that they shrivel. I store bulbs in dry vermiculite. Mesh onion bags, burlap or even pantyhose reduce evaporation yet allow some moisture to escape. Bulbs should be placed in a cool, dry area that will not freeze, such as a garage.