I have Plumago and I see no signs of any of it coming up now my Ajuga is up. Its been rainy,cold and windy here.
I assume you mean hardy plumbago, Ceratostigma plumbaginoides. This is a rather late to emerge plant.....I wouldn't expect to see signs of it until any bulb foliage is dying back, sometime later this month. It also maybe borderline hardy in your area as well. OTOH, ajuga is both evergreen, an early sprng bloomer and of much greater cold hardiness.