Is this sunburn or lack of Nitrogen
Deepa Rao
7 years ago
Hi All,
Can you please help my citrus tree ? it is Washington navel .When i bought it from the nursery it had many fruits which dropped and after that any fruit that developed also dried and dropped.I don't know how old the tree is.I am a newbie and I read that if the soil lacks nitrogen the leaves turn yellow .I appreciate any advice in helping me find out whats the problem is
here.Also if you notice there are stones around the tree which get heated too during the day.It gets ample sunlight.I water every alternate day.
Thanks,
Deepa
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Deepa Rao
7 years agoRelated Discussions
Unifinised compost and adding extra nitrogen to compensate?
Comments (6)This does illustrate one of the problems with purchasing "compost" from a commercial source, not everyone knows what compost should really be. What you bought was not even good leaf mold. Tilled into your soil this material may cause your Soil Food Web to concentrate on digesting that and temporarily tie up available Nitrogen while they do. This might cause a nitrogen deficiency which can be difficult to tell by looking at your plants because other nutrient deficiencies can appear with similar signs and symptoms. Many may tell you that yellowing of your plants is an indication of N deficiency and that chlorosis might be depending on how it occurs. The dilema is always do I add more N and if I do will that mean too much N later as the Soil Food Web finishes digesting that raw material and the N they used is put back into use? How long before your plants go into that soil? Here is a link that might be useful: Nutrient deficiencies...See MoreIs this sunburn or something serious?
Comments (5)Yep. Just sunburn and nothing to worry about. Those black/purple streaks on the plant are totally common. I don't think it's related to sun at all. Just a plant feature. I'm surprised you've never seen them before in years past. Might be a good idea to rotate containers since sunBURN can lead to scald(not good). Scald will turn a beige color and rots the fruit, but burn is nothing but cosmetic. I notice scald to be more of a problem with thick fleshed, large fruited annuums like Bells and Anaheims. Shade cloth or sheets work great at midday when the sun is at it's most intense. Kevin...See Moreworms lacking nitrogen output
Comments (14)what are "worm food products"? you mean castings? and increase in NPK over what? your garden soil? newspaper? doing a soil test on compost gives you an indication of the nutrient levels in that sample, reflecting nutrients that were used as initial bin inputs, nothing else, and if you had a good analysis of the NPK of those inputs you'd find there is less in the finished compost, the balance having leached, gassed off, or been used to support the microbial populations involved in the decomposition being most interested in food waste composting, both hot bin and worm bin, I've had a number of compost samples [from both methods] lab tested - the N varied from 1.8 to 2.8%, in a mineralized form [desireable], the food waste inputs all had higher N than that, in organic form .... in addition, boron, copper, iron, maganese and zinc were all higher than would be found in garden soil due to the fact that the foods we eat are generally high in those things the testing results certainly had some higher readings than the garden soil would have, and it no doubt had some lower as well - what's more important with compost is the bacterial content and the C:N ratio to support them, in the form of humus, those 2 things being the "health" of your soil, not high NPK readings the object of any composting isn't increasing anything or 'making fertilizer', it's the salvage and sequestering [capture] of nutrients otherwise wasted Bill...See MoreSunburn vs nitrogen deficiency?
Comments (28)The main issue, which applies to inground planting as well, is if you put it in too large a pot or hole the roots will grow for a relatively long time before the leaves/branches begin to grow. Example: if I put a tree into a hole about the same size as the container/nursery bag it was in, I would expect new growth in 2 weeks; if I put it in a bigger hole/container, as I do my gift trees, I may not get new growth for 2 months. Do they "like being root bound"? I don't know if there is much evidence of that; but the more root bound they become the more frequent they will need food and water....See More
Laura LaRosa (7b)
7 years agoDeepa Rao
7 years agolast modified: 7 years agoDeepa Rao
7 years agoDeepa Rao
7 years agoHi Laura,
Did this in the evening ...How long did you keep your plants in shade ?
Deepa Rao
7 years agoLaura LaRosa (7b)
7 years ago
Nancy(Alabama 8A)
7 years agoLaura LaRosa (7b)
7 years agoDeepa Rao
7 years agoLaura LaRosa (7b)
7 years agoDeepa Rao
7 years ago
myermike_1micha
7 years agolast modified: 7 years agocory (Zone 7a, NJ)
7 years agolast modified: 7 years agoNancy(Alabama 8A)
7 years agoLaura LaRosa (7b)
7 years agoNancy(Alabama 8A)
7 years agoLaura LaRosa (7b)
7 years agoDeepa Rao
7 years agolast modified: 7 years agomyermike_1micha
7 years agoDeepa Rao
7 years agoNancy(Alabama 8A)
7 years agoDeepa Rao
7 years agoHi Mike and Laura,
I went to Home Depot and was recommended this spray .I am using it now ....Also there is some insect eating the leaves and then some white to brown patches on the back of the leaves. Hope this spray helps . I will post back the update if my tree improves...
Thanks,
Deepa
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