Question
i am planning to plant some big dahlia flowers this winter , what care should i take .
1.fertiliser i am using is decomposed cowdung ,
2.what about watering .
3.I have seen termites in the soil , are they harmfull , what i need to do.
4.Should i keep them in shed or they will be best in open.
(now a days weather is volatile , so even though it is winter , there are sudden blows of temperatures during afternoon).

Answer
Dahlias need heat and sun.  Above 88 degrees, and the Chlorophyll A stops working.  Below 48 degrees F, the Chlorophyll stops working.

Temperature fluctuations are stressful, but can be overcome.  Consistency is important.  It is vital, however, that temperatures in the darkness be lower than they were in sunlight.  Deviations from this schedule interfere negatively with growth and metabolism.

Since light is necessary, a shed would be out of the question.

Your choice of fertilizer is ideal.  But make sure these Dahlias have dark, rich Soil, and do not forget to water them even for a day.  These look tough, but they aren't.  They need to be watered.  I repeat:  Dahlias NEED to be watered.

Good luck!

THE LONG ISLAND GARDENER