PM soil AUTO Grow Second Grow day 41 Looking for Some Help

goose_chase

Member
Day 41 from sprouting
6x Norhtern Light x Big bud AUTO from World of Seeds
Germ in Root Riot then moved to 12l pots
PM Soil supreme and perlite mix
Waterings with bottled spring water and tap water that I leave standing.
600 watt Sunmaster dual spec with parabolic 20/4
1.2x1.2m
temps humidity are good.
Nutes I have available: PM OT Grow and Bloom,PM cal mag+, Canna mono Nitrogen.

Hi everyone, I'll try to keep this short and sweet.

I underfed and was seeing clear and definite signs of a N deficiency
(On my last grow I got the same thing but misdiagnosed as Mg deficiency and fucked things up).

I gave them 1/4 strength grow nutes followed by a plain watering then I gave 1/2 strength feed.

I think I suffered from impatience again and used a 1/4 strength dose of Canna mono Nitrogen (Seemed to make sense) I know that I probably shouldn't have done that as it can damage the micro herd.

This seemed to make an explosion of new growth lower down which was very healthy looking but puny low down branches so I pruned away the lower parts of the plant.

Since the Canna mono N I have given just water until the watering before last when I gave 1/4 strength Bloom Nutes and some honey (hoping to help any surviving bacteria multiply)

All new growth is now nice and green etc, however I'm seeing signs of what may be N toxicity, with leaf tips curling down.

HERE COMES THE QUESTIONS:
The rest of the plants are showing that they need P and K but I feel I may have loaded the soil up with N now so I wonder can I flush the soil with water from the tap (Ph 7) without letting it sit? Ideally I would like to do this without letting the water sit as I don't really have the room to let what would be over a hundred litres of water sit around my flat.
The plants have started flowering but flowering is definitely much slower than should be (as they are P and K deficient) Obviously I really want to give them what they need.
Also, will dropping to 18/6 from 20/4 help speed up flowering?

Beggars can't be choosers but I'm really looking for advice from people who speak from experience here, so any PM users/Auto growers out there; I'm listening...:dunce:IMG-20160612-WA0001.jpg
 
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