15-30-15 Nutes?

Im using 15-30-15 nutes, i am 9 days into flowering and i was wondering if i should start feeding them. Will this work

I can give pics if needed

Thnks

i would have a heavier Pottsium end for flower.... And not so much Phos. I usually stick to the 123 formula`s.... ie: N10 P15 K20 for flower... the oppisite for veg ie: N15 .P10 K5
9 days of flower is fine for feed - use 1/2 recommended (if you have not been useing nutes) and work your way up to full dose....