The problem with morning glories is not getting them to germinate, but persuading them to hang on to life once they have done so. The usual advice is to soak the seed before you sow it. I don't usually bother and find that, sown one to a 3in pot, they come up pretty easily.
But, being natives of subtropical regions of central America, they hate cold and draughts. Hardening them off gently and gradually is the key, before introducing themto their planting positions outside. This is easier to do if you don't sow too early. Once they start to grow, they grow quickly. You can grow them permanently in pots, but you will need to move them on from the 3in pots to ones twice the size.
Being subtropical by nature, morning glories like it wet as well as hot. This, I suspect, is why Mrs Roberts' plants are doing slightly better on the wigwam than they are on the wall. The footings of walls are notoriously dry places.
Any dramatic drop in temperature, any chill wind, will make the foliage go white and then growth stops completely. This year has not been an ideal one for heat-lovers such as morning glory. That's what I'm telling myself, anyway, because mine have failed too.Reuse content