Backyard Aquaponics
A place to discuss aquaponics

The corn is doing great and I haven't seen any signs of deficiency in the corn until this week.



What do you collective peoples think is missing here?

Also getting a lot of this pattern which I had put down to some insect

The zucchinis have obvious problems and I've been working on that with a foliar spray from the disscussion in the kale thread.



The new growth seems to be doing better but I'm concerned that the old leaves have got worse over the last week suggesting that they need another foliar spray of Mg and K (?) shortly.

I had put the holes in the Rhubarb and horseraddish down to slugs or something but Damage or Cookie (or someone) on another thread said that holes in leaves was a Mg problem.




We will see how the next week goes. I've added MgSO4 and Lime. A whole cup full of lime did stuff all to the pH so I've got plenty of room to move (pH ~6.4).

Interestingly the constant flood bed seems to be struggling where as the FnD bed is begging to run.

Big difference Stu! I have the same thing happening in my system, F&D seem to outperform CF, but not very definitive on my end as hours in sun is different, and I perhaps pick more from certain beds.

Is your pH still really high? Could it be locking out the nutes?

I think i can see powdery mildew in a couple of the pics as well....

The FnD bed I got about 5kg off about 2month ago. It is so in need of another harvest but I haven't had the time to process it so I've left it to grow.
The Rhubarb in the CF (F=flood both beds are CF (flow) so as not to confuse ) hasn't been picked this year at all.

pH has finally dropped from ~8ish to 6.5 and that is after adding bits of KOH, and lime. After the discussion in other threads I've been adding more lime and MgSO4. I think the high NO3 is what has been locking out nutrients although that doesn't explain why the CF is so far behind the FnD.

That is residue from the foliar spraying. Which brings me to a question...should I do a water spray to redisolve/wash off the residue?

I have a feeling it's the same reason as mine. Channelling, the water is taking the path of least resistance through the beds, which I'm guessing is through the irrigation pipe you have along the bottom, then the plants aren't getting fresher water, and aren't growing as fast.

Just a guess though.

Maybe.

In which case I'd expect that the plants at the start of the bed would be growing well but also at the end of the bed which they are not.

My guess is O2 depletion. I've had an O2 sensor on order for a while but I still don't have it yet so I can't check.

It makes sense that if DWC doesn't do as well without aeration as with then the same would be true with large media filled beds run CFd.


How is that as an acronym for Constant flood
Which would would make constant flow CFw

Hi
i am just reading a book.

So this monkey says;

Yellow leaves
IF OLDER LEAVES
Lack of nitrogen caused by wet soil ( media) - wet soil stops nitrogen being taken into plant
This would correlate with your FD versus CF observations
Titus
PS improve drainage or reduce watering

It could be but I don't think so Titus.

The really yellow leaves I posted above are on the Zucs in the FnD bed where as the Zucs in the CF bed are not as badly affected.

Also if you look at the super yellow leaf above and this shot here from two days ago



Then compare it with this one from today



You can see that I might have got on top of things.

Well at least improved them.

In that last shot the bright yellow leaf that I posted at the top of this page is now hidden behind the growth of the new leaves. You can just see it peeking out from behind the new leaves and the wooden edge of the GB.