Irids from SIGNA seed exchange

I have seedings of the following irids.

Alophia drummondii AKA purple pleat leaf or pine wood lily
Dietes grandiflora
Dietes iridioides (may be synonymous with above)
Babinia stricta (Not SIGNA seed)

None of these have bloomed as yet.   The dietes and babina were easy
to germinate.

I tried Herbertia lahue which germinated but were lost.

I also have Morea stewartae seed.  They seem unwilling to germinate. 
Does any body have any suggestions?

Rodney Barton
Hickory Creek, (North Central) Texas, USA
Zone 7/8, typical temp range 15 - 105 F (-9 - 41 C)
AIS, SIGNA, SPCNI, SLI, FWIS, Iris-L
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