What is the meaning behind the Mother’s giving us flowers — I mean, what does she try to do to us? 
Simply to put the power indicated upon you if you are willing to receive it. It is a progress suggested and offered.
It is said that the five petals of the flower called “Psychological Perfection” mean love, bhakti, surrender, sincerity and faith. But today she gave me this flower with six petals. What does the sixth petal indicate?
The five are purity (not love), devotion etc. The sixth is steadfastness (stability, etc.).
This morning the Mother gave me a flower signifying “The Divine Consciousness”. What did it mean for me?
It meant that she offered the higher consciousness or her consciousness to you — that is all.
In a dream I saw a flower signifying “Victorious Love”. Has it any connection with my sadhana?
It is usually some force that is represented, probably here some vital Power that seeks transformation through love.
Nowadays I see different kinds of flowers during meditations and waking state with eyes wide open. Sometimes they themselves announce their significance. As for example, one flower surged up before my eyes saying: “Aspiration for the Divine.”
It is usually when the psychic is active that this seeing of flowers becomes abundant.
 This is what the Mother, in one of her talks, said about flowers: “I can transmit a state of consciousness more easily to a flower than to a man… If you are receptive, you will easily be able to absorb the message I put in the flowers I give you. When I give them, I give you states of consciousness: the flowers are the mediums.”