Sudden nutrient deficiency, I suspect nitrogen. Didn't see this coming.

Beard-o

Beard-o

Well-Known Member
Didn't see this coming. Watered and did one more LST to my plants on Tuesday, they look great. Checked them over yesterday still fine.

Look in this morning before breakfast, and oh, oh! Slight yellowing of the lower leaves. That was not there 24 hours ago.
Go up after lunch to feed them, and not only are lower leaves yellowing, but it's climbing up the plant. These are autos, 2 weeks into flower. One plant, the smallest, seems fine. The other three have it to one degree or another. Esp the one I really was looking forward to, Wedding Cheesecake.
So I fed them Tiger Bloom, Calmag, and pHed the water to 6.5. Soil is FFOF, light is 1000w HPS.

Should these plants recover?
 
P

Phytoplankton

Well-Known Member
Beard-o said:
Didn't see this coming. Watered and did one more LST to my plants on Tuesday, they look great. Checked them over yesterday still fine.

Look in this morning before breakfast, and oh, oh! Slight yellowing of the lower leaves. That was not there 24 hours ago.
Go up after lunch to feed them, and not only are lower leaves yellowing, but it's climbing up the plant. These are autos, 2 weeks into flower. One plant, the smallest, seems fine. The other three have it to one degree or another. Esp the one I really was looking forward to, Wedding Cheesecake.
So I fed them Tiger Bloom, Calmag, and pHed the water to 6.5. Soil is FFOF, light is 1000w HPS.

Should these plants recover?
Click to expand...
Are you giving them any N other than the tiger bloom? As I recall at three weeks into bloom you should still be giving them Grow Big, at a reduced rate. Leaves yellowing from the bottom up the plant is a symptom of a nitrogen deficiency. It’s not the only possibility, but it’s likely. Depending on how washed out the leaves are, most should recover quickly.
 
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Beard-o

Beard-o

Well-Known Member
Phytoplankton said:
Are you giving them any N other than the tiger bloom? As I recall at three weeks into bloom you should still be giving them Grow Big, at a reduced rate.
Click to expand...
My last feeding I gave them 1/4 strength Grow Big and 1/4 strength Tiger Bloom. The only thing I can attribute this to is, I'm two days behind on my feeding? I always pH my water to 6.5.
Ive used Grow Big and Tiger Bloom for years on my photos, with fine success. I guess autos are different.
 
P

Phytoplankton

Well-Known Member
Beard-o said:
My last feeding I gave them 1/4 strength Grow Big and 1/4 strength Tiger Bloom. The only thing I can attribute this to is, I'm two days behind on my feeding? I always pH my water to 6.5.
Ive used Grow Big and Tiger Bloom for years on my photos, with fine success. I guess autos are different.
Click to expand...
Actually I’ve found that autos are fairly heavy feeders, once established. I’d up the nutes to half or even three quarters. Lastly, and importantly, what are you growing in? Soil?
 
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