Posted: 25/06/2016 at 15:12
Michael, T&M send out plugs raised in hothouses with bottom heat and misting systems. Invariably they have poor root systems as they rush to fill orders. The best way is to pot into 9cm pots any compost will do, water from underneath and keep them sheltered in semi shade or shaded GH. Plugs take 6-8 weeks to form a decent root system especially perennials, which are slower growing than the annual plugs sold. Feed them with a liquid seaweed food which I've found gives a good root system in a reasonable period. Once the roots fill the pot they can go out. I don't know what you've got but T&M usually flog the easy stuff so they'll establish before winter comes. Don't over water, that's the usual cause of plug death and never from above. A tip as to when to water is the weight of the pot. Lighter it is means watering so they can dry out quite a bit before watering.