Humidity is just one of the factors to consider...we can have humid conditions here, but temps may be cold since we only get that around winter, so still not the ideal rooting time for Plumies. This year's Spring had a rather long period of cool down, humidity was better but temps were just too cool for them
This week has finally started to be particularly warm to heat wave conditions for us here. Practically the same period my noid Plumie finally started to push newer leaves. It has been on clawing stage for most of Spring. You may have not given your cuttings enough time to push the new leaves. To categorically say the rule of thumb is false, is such a generalization, some newbies may make the mistake of giving watering when it should not be done yet.
And you did say there was not a root found last week. The roots you found in the last 7 days, were they long enough already? You should have taken a photo for analysis of the condition of newly formed roots.
Anyways, such is the differences in growing Plumies..there will always be a challenge somehow..I am just glad mine are growing well now! Yey!
