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Over wintering plants (1 reply)

kelv.r
3 weeks ago
kelv.r 3 weeks ago

Several questions.

1 lve now got a thermostat fan  heater  and a double 1800 mm long  led daylight spectrum light set up in my green house. Its draft proofed and has been lined with bubble wrap. Can l continue growing my tuberous begonias tomatoes and geraniums through out the winter. If not what could l try as flowers or to eat. Ive also got brugmansia seeds so when is the best time to sow them considering l have heat and light. Will this give me an even earlier sowing planting opportunity for next year etc. This is my main question but the other two would be very helpful too.

2 lve also built a 4mtr x 2mtr x 600mm high cold frame with a 50mm thick polycarbonate top also well insulated with power for heat and light if needed. What could l start off or grow in that over winter in that.

3 Lastly ive also the same size coldframe but only 300mm high also well insulated with possible power and the same poly top. Just need advice on the best way to get the best out of them now that lm semi retired and also getting involved in communal planting so would use some of my plants to contribute to that.

Regards 

Kelvin.

 

 

SoCalMike
1 week ago
SoCalMike 1 week ago

Hi Kelv.r,

You may have left out some important details. You'll need to consider light output and temperature. You should target a minimum of 50 degrees Fahrenheit (10 C) for Brugmansia to remain attractive, though they'll tolerate garden (outside) temperatures well below that generally (B. sanguinea and more tropical species are the exception). Tomato might require minimums of at least 55 F ( and daylength at least 12 hours) to survive, but you'll be expecting a serious drop in productivity. (You might make a separate enclosure within the greenhouse to keep the tomatoes around 75 F). The begonias are bulbous, an adaptation that isn't negotiable as far as I know. I believe they need a dormancy. I would guess that floral productivity would decrease and plants may decline if they don't get to rest. The geraniums should be okay with above freezing temps, but there are lots of Pelargoniums (called geranium) and true Geraniums (the genus), some of which need special conditions. Common Pel. x hortorum, grandma type geraniums are pretty tolerant of cool/cold winters near freezing, but watch out for wet conditions and keep an eye on bacterial leaf blight and fungal infections. Those hybrids are partially succulent, and they can melt in weather below 31-32 F.




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