420stoney1
New Member
I have this type of spot on two places of the plant. Curious to what it is.. :0
Yellowish spot. Plz help
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Bugeye
Well-Known Member
Bingo.
polishpollack
Well-Known Member
nugs1, how do you know it's mag def? did the appearance improve with more magnesium?
roseypeach
Well-Known Member
Nugs1
Well-Known Member
If you look at grow weed easy. com then look at the diagnosis.
Mine specifically are still green in the veins which is indicative of magnesium deficiency but mine is also suffering from a calcium deficiency which is causing the spots to appear, and may also cause a manganese deficiency. If I remember my studies calcium assists in the manganese uptake. So being calcium deficient is going to screw you up in all three of these mostly because most nutrient lines add these together in Cal/Mag.
Also Mn is immobile ( meaning it only moves upward) so that deficiency shows on top leaves. Mg is mobile and shows on the bottom leaves.
Edit: wanted to add... I think these deficiencies won't show better, the damage never goes away but stops spreading and thats how you know everything is back to normal.
roseypeach
Well-Known Member
Black spots don't come from any deficiency, they come from a fungus called leaf septoria aka black spot.
What you have there is most likely black spot. It occurs on roses most frequently but given the right conditions, it can spread by other plants as well.
Unless you've burned your plant with too many nutrients, she's done, chunk her. Now if it's on less than a third of the plant, you can try removing all the affected leaves and treat it for the fungus. I spray peroxide weekly (1 part peroxide to 2 parts water) on my hydro herb garden and outdoor garden to keep it in check.
This is from over fertilizing
This is leaf septoria (aka black spot)
@420stoney1 only you can see your plants, does it look like one of these?
If not, here's a link to a great guide on diagnosing
https://tinyurl.com/yd3vf35p
What you have there is most likely black spot. It occurs on roses most frequently but given the right conditions, it can spread by other plants as well.
Unless you've burned your plant with too many nutrients, she's done, chunk her. Now if it's on less than a third of the plant, you can try removing all the affected leaves and treat it for the fungus. I spray peroxide weekly (1 part peroxide to 2 parts water) on my hydro herb garden and outdoor garden to keep it in check.
This is from over fertilizing
This is leaf septoria (aka black spot)
@420stoney1 only you can see your plants, does it look like one of these?
If not, here's a link to a great guide on diagnosing
https://tinyurl.com/yd3vf35p
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Lucky Luke
Well-Known Member
If it is black spot you can treat it . There are plenty of safe and organic ways to treat black spot. Try using two teaspoons of bicarb soda in 5 litres of water, add a couple of drops of detergent or a couple of drops of seaweed extract. This makes an excellent and inexpensive fungicide. Or use Bordeaux mixture or one of the other copper based fungicides.
But the OP is saying yellow spot..so its probably more a spill or a cal/mag issue.
But the OP is saying yellow spot..so its probably more a spill or a cal/mag issue.
roseypeach
Well-Known Member
I must have missed his saying that..I'll have to go back and re-read the thread. If it should turn out to be black spot and the affected leaves aren't removed, it will continue to spread.
I endure the stuff every day in my outside flower garden. It's ruined two hydrangeas and now it's nearly killed my Mr Lincoln rose
It's a daily struggle to stay on top of the stuff. All it takes is one spot on one leaf to go unseen and one hot, humid day and the stuff spreads like wildfire.
Lucky Luke
Well-Known Member
yep it can do. In my job i treat it all the time.I must have missed his saying that..I'll have to go back and re-read the thread. If it should turn out to be black spot and the affected leaves aren't removed, it will continue to spread.
I endure the stuff every day in my outside flower garden. It's ruined two hydrangeas and now it's nearly killed my Mr Lincoln rose
and its in the title.
roseypeach
Well-Known Member
so it is LOL
it's really hard to dx when there is no picture to refer to.
Can you post a pic of the whole plant? Did it come from the bottom?
I don't believe that is a calcium or magnesium deficiency, looks more like necrosis (pH issue/lock out) or maybe drops of water that burned through. Without a picture of the whole plant it's hard to say for sure.
Unless you see that throughout the plant, yank the leaf and let her be.
Nugs1
Well-Known Member
I'll have to do it tomorrow had a busy day today, first time on today.
I will say that for some reason this plant is the only one thats hurting so bad. The others are just a little touch but not bad. The plant that the leaf came from is hurting, its moved up to the middle of the plant only on the fan leaves, however the burning/ spots have lessened. I flushed them all with some good solutions about 2 days ago and they all seem to be responding. This plant is as well but slower, possibly due to its worse condition.
I am thinking cal mag deficient because Im using two brands of nutes, GH and Raw but only the amendments. I was using the GH trio and gh calmag as per the feeding schedule once a week and also making a solution with all the Raw amendments as an extra kick..... but I was somehow forgetting to add cal mag. So the plants only got cal mag once a week. So I am 100% positive that is and issue but there may be others.
I also noticed today while checking run off ph's. All were fine (within executable ranges) except the one thats hurting so badly. It was surprisingly low. I fed it ph 6.3 and got back out 5.7... so something is going on in there I just don't know what yet. I hate that I hijack this duded thread tho.... I posted one similar and no-one responded. Sorry OP.
polishpollack
Well-Known Member
Nugs, sounds like over fert in that soil.
Nugs1
Well-Known Member
Yeah could be the issue with the one thats hurting, definitely a couple different problems.
Heres a couple pics of the whole plant that was/is hurting. I will note that it has grown about 4-6 inched in the last 3 days which I take as a good sign.
