Re: rex begonias from seed


I think you removed the dome too quickly. The plants need time to acclimate
to changes in humidity. I would prop up one end of the dome to allow some
air to circulate. If the plants are in a very dry area, you may need to use
humidity trays. 

Margaret
At 11:42 AM 10/14/00 -0400, you wrote:
>
>My first grader is doing a seed propagation project.
>Please comment on how to improve the plant growing:
>
>We started 120 rex begonia hybrid. from seed (Park Seed
>Co.).
>Mixed lot with seemingly several types in the package
>In a dome gh/flat. (Park Seed Mini-dome): Styrofoam seed
>tray (60/flat) in a pan for water/fertilizer
>
>Seed planted end of August (7 weeks)
>Soil is sterilized soil / humus
>Day temp 75-80F
>Night temp 60-75F
>Aux lights 13 hours (florescent 25W high output=100W
>incandescent)
>Fertilize @ Parks recommended dose of all purpose fertilizer
>At this point we have about half of the plants growing but
>only about 40 out of 120 planted seem to be good quality.
>
>The seeds are slow to grow. Half are growing relatively fast
>and other half are about 2-3 weeks behind.
>Some of the seed places had developed a green slime but did
>not seem to affect the plant growth.
>About 10 seed places developed a white fungus type growth.
>We treated with mild Clorox applied by paint brush. White
>disappeared by came back after a week. Some of the plants in
>those spots seem weak.
>
>For a few days we removed the dome and found that many of
>the leafs drooped.
>After replacing the dome the plants are coming back
>
>Do you have recommendations to improve the plants and to
>control the fungus
>
>regards
>Joel
>
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