It's strange that 48 hrs of total darkness didn't trigger them. Clones react the same way their mother does, to the same enviroment and growing conditions; except these aren't in pots, like their mother was; and it isn't clear to me if they're in the same soil / growing medium as their mother was.
As slabsofdank suggested, you should cut down their daylight to 10 hrs until you see budset. Next, if you aren't using a biostimulant to accelerate P uptake / metabolism, it's a good idea to introduce one. Have you ever used or heard of EM?
Role of microorganisms in nutrient mobilization and soil health—a review
A FEW EXCERPTS from the above paper:
Microorganisms are key players in the cycling of nitrogen, sulfur and phosphorus, and the decomposition of organic residues.
Role of p solubilizing bacteria in p solubilization
The introduction of efficient microbes (P solubilizers) in the rhizosphere has been found to increase the availability of phosphorus from both applied and native soil phosphorus.
CONCLUSION: Solubilization of nutrient by microorganisms proves to be beneficial and economical because of high cost of chemical fertilizers and widening gap between there supply and demand. Microbial inoculants are ecofriendly and environmentally safe of low cost technology, improve productivity, reduce environmental pollution. Microbes play a vital role as organic fertilizers in facilitating uptake of nutrients in a crop.They are beneficial in maintaining the physical, chemical and biological components of soil. [END OF EXCERPTS]
The above paper only refers to introducing effective microorganisms (EM) into the rhizosphere, but I would definitely foliar spray your plants with them as well. There are a few liquid EM products on the market, but I use TeraGanix EM-1. If you don't have something like that yet, give it a try. It won't disappoint. It will optimize phosphorus metabolism. That, combined with a 14 hr night cycle, should get them to bloom, I think.
What is EM® (Effective Microbes®)? with Matt Powers
Cheers! - FF
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