Dropping Plants and Yellowing tops

[mrwallstreet]

Hello I have been having issues with my plants dropping.I recently switched over from veg to flower. While in veg everything was nice and perfect with all leaves reaching for the light and standing high. Now I am in week 2 of flower and all my plants have been dropping and all tops turning yellow. At first the temperature was really low at nights reaching in the low 50s which I thought might have been the problem. I since then raised the temperature where I am 58 degrees -65 at night and 70-75 during the day when the lights are on. My PH is at 5.8-6.0. I am in rock well and use the EBB system where I flood them once - 2 a day but mainly once. I looked under the block and all the roots look good with new white ones coming out. Growth seems to have stopped and no signs of any bugs at I did a root aphid wash in veg and a bug bomb week 4 of veg before kicking over. Any help would be greatly appreciated.

 

[cemchris]

You are only flooding an ebb table 1-2 times a day? What medium are they in (rockwool? if so what size block/slab) What size containers?

 

[mrwallstreet]

You are only flooding an ebb table 1-2 times a day? What medium are they in (rockwool? if so what size block/slab) What size containers?

Yes flooding 1 -2x times a day, they are in 6 x 6 rockwool grodan blocks. they are in a 3x6 botanicare tray. I have a 45 gallon reservoir under each tray that floods only when the lights re on 1 -2 depending on how heavy the block is.

 

[cemchris]

Yes flooding 1 -2x times a day, they are in 6 x 6 rockwool grodan blocks. they are in a 3x6 botanicare tray. I have a 45 gallon reservoir under each tray that floods only when the lights re on 1 -2 depending on how heavy the block is.

Ebbing cubes in veg for the veg time shouldnt be an issue. You will have an issue with lockout and wacky PH/PPM in the blocks if you arent top feeding cubes at least once a week in flower. You will get mad buildup at the water level.

How long does it take to flood and drain the table? Using 1in fittings on both flood and drain fitting? Same with pump?

 

[mrwallstreet]

Ebbing cubes in veg for the veg time shouldnt be an issue. You will have an issue with lockout and wacky PH/PPM in the blocks if you arent top feeding cubes at least once a week in flower. You will get mad buildup at the water level.

How long does it take to flood and drain the table? Using 1in fittings on both flood and drain fitting? Same with pump?

Makes sense. I have not top fed at all mostly just let it flood and drain. It typically stays on for 10-15 min then drains itself and it takes about 10 min to completely drain. I have 3/4 for my drain and 1/2 hose for my feed. What do you suggest? I fi am locked what do you think the nest remedy for that is? Should i be concerned that i am in week 2 of flower and no signs of buds at all?

 

[cemchris]

Makes sense. I have not top fed at all mostly just let it flood and drain. It typically stays on for 10-15 min then drains itself and it takes about 10 min to completely drain. I have 3/4 for my drain and 1/2 hose for my feed. What do you suggest? I fi am locked what do you think the nest remedy for that is? Should i be concerned that i am in week 2 of flower and no signs of buds at all?

Where Ebb tables shine is how quick you can get the water out of the table and in. Switch the pump, fill and drain fittings to the 1 in ones. Remember when the pump turns off you are now draining through the feed fittings. I also let it overflow for a couple of mins out of the drain to get a good mix and aerate the rez.

Naw just flush a good amount of nutes through the top of the cube before the first flood and skip it. I usually like to do this on rez change day (assuming you are changing rez's weekly). Flush plant quite a bit, change rez, fresh nutes to start on fresh flushed blocks. This will keep all of that buildup out of the rez and keep the PH more stable.
you can also run a separate pump with a hose out of the current rez and do that for an easier solution. Make sure to flush with feeds or flush with around 200-300 ppm water. I would never give them plain water.

I personally never liked ebb for flower in cubes. Great for veg since you have a flex number and don't have to worry about individual drippers for each plant. Flower is usually a solid number so even doing recirc drip on the ebb tables instead of flooding them will get rid of the buildup problem and you can skip that step once a week.