Posted: 03/11/2015 at 16:15
Don't get hung-up about watering, as I've said previously, just try to avoid the roots standing in water, especially during cold weather.
As temperatures are at present over the UK, keep your pollytunnel ventilated day & night....in fact it would be best kept ventilated at all temperatures above say -10c. Remember they are very tough little characters.....I've never lost any to frost.
Re training, as you will know there are two basic methods, 'cordon' & 'decorative'.....cordon I use for exhibition quality flowers and decorative for cut flowers. The cordon method is very labour intensive, but the results are stunning.
Hanging basket compost will be multipurpose, as (unlike autumn sown seed) they, being sown in spring will benefit from the additional nutrients.
Finally, I would say if your spring sown SPs have been disappointing this year, it was probably more down to the weather, than any mistake on your part.