Bulbs in containers

Asked August 20, 2014, 2:13 PM EDT

I planted several different flowering bulb-type plants in containers to adorn my home's outside entry. Don't know the names of all of them, but some are begonias, and they all came from Costco bagged bulb assortments designed for growth in a shady environment, and they are doing really well. I also have a number of dahlia bulb plants in my backyard - this is their second year - and they survived the winter in the ground without extra mulch. My question is this: for the containerized bulbs, how can I insure they survive the winter? Cover them in some way, move them into my garage, etc? Should I keep their soil moist during the winter? Or I need to dig them all up and replant them in the spring? If so, how best to keep the bulbs over the winter? Thanks!

Multnomah County Oregon bulbs horticulture flowers: annuals and herbaceous perennials

2 Responses

Tuberous Begonias can be stored over the winter and planted again in spring after frost (usually Mid-May in Portland). From an OSU article: "Remove plant from pot before hard frosts occur. Cut back most of the top of the plant, leaving the ball of roots and soil intact. Place in a dry, cool storage area (a basement or garage) and allow the tubers to cure for several weeks.After curing, shake off the soil and remove the remaining stalks and roots. Any stalk or root left has the potential to rot and spread to the tuber. Put them on screen trays or pack them in dry peat, sawdust, sand or other insulating material.Store tubers in a dry, dark, cool (above freezing) area." (http://extension.oregonstate.edu/gardening/dont-toss-those-tuberous-begonias-save-next-summer )
The springtime steps are listed in this article: "Ready stored Fuchias, begonias and geraniums for the outdoors", http://extension.oregonstate.edu/gardening/node/783

Thanks, Jacki, great answer! And thanks for the resource link, so I can find other answers...
Tom W.