|Soak entire pot contents|
There are different types of begonias according to Gary Turner, including cane, shrub, thick stem semperflorens, rhizomatous, tuberous, trailing/scandent. Cane-types can be rooted in water.
|Begonia rhyzome growing over pot|
A few of ours are so crowded that their rhizomes are crawling over the sides of their containers. We keep ours outside in flower beds, under trees, all summer in pots and our summers are 100 and above with pretty high humidity.
|Gently separate rhyzome clumps|
When repotting, place the plant as low in the new pot as possible to bury more stem buds and encourage more canes and roots to grow.
|Separated begonia rhyzomes|
Start the dividing process by letting the container dry out so you can slip it all out in one piece. Then, soak the contents to soften it all to make it easy to remove loose soil and get your fingers between the rhizomes to gently pull them apart.
Our potting shed is filling up with wonderful projects like this that keep our fingers in the soil all winter long!
Turner, "Optimum temperatures for Cane Type begonias
range from 55 degrees at night to about 80 degrees in the day. Some survive short bouts of freezing weather, and others can withstand 100 degree summers. Higher humidity through misting helps them grow better in higher temperatures."
Carol Notaras and other members of the San Francisco Begonia Society use a basic blend of: • 1/3 Potting Soil, 1/3 Perlite• 1/3 Orchid Bark (small or micro-chip size)
Joan Coulat of the Sacramento Begonia Society recommends this special soil mixture recipe includes the following: • 2 bags of 2 cubic feet Professional Potting Soil• 2 bags of 2 cubic feet Master Nursery Paydirt with Soil NʼRich• 3 - 1/2 gallons of Perlite (course) • 2 - 1 gallons of Vermiculite (course) ● 1 - 1/2 cup of Blood Meal• 1 - 1/2 cup SuperPhosphate ● 1 - cup of Bone Meal• 1 C Agricultural Lime ● 1 - 1/2 cup of Ironite