Japenese Boxwood problem??

[BoostedBonsai]

so i been getting leaves on a couple of my boxwoods that the margins turn yellow , at 1st i thought it might be the cold temps at night and hot temps in the day but one of them seems to be drying out the leaves after not sure if its some fungus, i do spray fungicide monthly

 

[sorce]

I can't say it's correct, but ever since I come up with the idea, I haven't gotten that problem.

IMO, it's not overwatered or too much sun.

It's both.

Full Sun and little water is OK.

Little sun and full water is OK.

But a lotta sun and a lotta water means constant transpiration, which leads to worn out leaf edges.

Sorce

 

[BoostedBonsai]

i

I can't say it's correct, but ever since I come up with the idea, I haven't gotten that problem.

IMO, it's not overwatered or too much sun.

It's both.

Full Sun and little water is OK.

Little sun and full water is OK.

But a lotta sun and a lotta water means constant transpiration, which leads to worn out leaf edges.

Sorce

interesting, i didnt think about it like that? im 90% sure i water them well soo when i 1st saw this on the 1st leaves i thought maybe i was underwatering so i started giving them slightly more water

its just crazy cus not all my boxwoods have this some like the 2nd picture thats the only set of leaves like that in whole tree but the other tree like 1st has quite a bit and the older leaves with the problem seem to have dried out

 

[River's Edge]

so i been getting leaves on a couple of my boxwoods that the margins turn yellow , at 1st i thought it might be the cold temps at night and hot temps in the day but one of them seems to be drying out the leaves after not sure if its some fungus, i do spray fungicide monthlyView attachment 295827View attachment 295828

You have not mentioned a couple of key factors that affect Boxwood cultivars. Amount of sun or shade provided? Substrate used for the plants? And just as importantly the water supply? I note considerable deposit on the leaves from either the water or chemicals applied!
If I had to guess based on the pictures alone, I would suggest they are drying out at times and placed in too much direct sun. If that is not the case then I would lift the affected plants and examine the roots ball condition and soil composition for proper drainage! With Boxwood I like to repot every two to three years to keep them in optimum condition and I find they do better in partial shade. Their foliage is deeper in color and growth pattern shorter internodes. Note: I work primarily with small leaf variety boxwood like Kingsville. When touring California nurseries I noted they are usually under shade cloth or on the east side of structures for shadier locations.

 

[sorce]

When touring California nurseries I noted they are usually under shade cloth or on the east side of structures for shadier locations

It would be so interesting to find that the necessary "over" compensating for the Cali Sun is what allows them better health.

Where here, since we can get away with it, we don't deep shade them, and end up with plants not as healthy.

the only set of leaves like that in whole tree

That is the part that starts making little sense at all to me.

Sorce

 

[River's Edge]

When I look closely, some of the newer lighter green leaves show yellow margins as well. It seems to be beginning even on some of the new foliage!
If only on one branch then suspect a root issue or injury from wiring or pruning. Boxwood are a bit trickier to wire and the bending must be slow and careful. Best done on the newer shoots, avoiding thicker more mature wood. A wiring injury will normally show a darkening of the cambium or obvious crack in the branch. My Boxwood do very well in partial shade even though I am not in a hot climate. They only lighten in colour when placed in too much sun or drying out. Of course the new growth is lighter until it matures.

 

[BoostedBonsai]

You have not mentioned a couple of key factors that affect Boxwood cultivars. Amount of sun or shade provided? Substrate used for the plants? And just as importantly the water supply? I note considerable deposit on the leaves from either the water or chemicals applied!
If I had to guess based on the pictures alone, I would suggest they are drying out at times and placed in too much direct sun. If that is not the case then I would lift the affected plants and examine the roots ball condition and soil composition for proper drainage! With Boxwood I like to repot every two to three years to keep them in optimum condition and I find they do better in partial shade. Their foliage is deeper in color and growth pattern shorter internodes. Note: I work primarily with small leaf variety boxwood like Kingsville. When touring California nurseries I noted they are usually under shade cloth or on the east side of structures for shadier locations.

maybee thats my problem i have all on full sun and maybe theyve been drier then theyd like on these random hot days, and for the white shit on my pot thats from my fertilizer but i also do have shitty water

 

[BoostedBonsai]

When I look closely, some of the newer lighter green leaves show yellow margins as well. It seems to be beginning even on some of the new foliage!
If only on one branch then suspect a root issue or injury from wiring or pruning. Boxwood are a bit trickier to wire and the bending must be slow and careful. Best done on the newer shoots, avoiding thicker more mature wood. A wiring injury will normally show a darkening of the cambium or obvious crack in the branch. My Boxwood do very well in partial shade even though I am not in a hot climate. They only lighten in colour when placed in too much sun or drying out. Of course the new growth is lighter until it matures.

im thinking theyre not liking the hot sun, when this started happening i would get frost at night and 70 degree weather during day so i thought the plant was just tripping but i didnt know they didnt like full sun that much

 

[BrianBay9]

In your location I would keep boxwood in partial shade for now, and full shade as your weather heats up. Boxwood are going to be a challenge in the central valley. If you can find any used in landscaping near you that look good, note the location. I'll bet they're all in shady spots, assuming you find them in the landscape at all.

 

[River's Edge]

im thinking theyre not liking the hot sun, when this started happening i would get frost at night and 70 degree weather during day so i thought the plant was just tripping but i didnt know they didnt like full sun that much

This will be subject to the varietal selected as well, if you move to a shadier location you will know in a week or two by the color change.

 

[BoostedBonsai]

In your location I would keep boxwood in partial shade for now, and full shade as your weather heats up. Boxwood are going to be a challenge in the central valley. If you can find any used in landscaping near you that look good, note the location. I'll bet they're all in shady spots, assuming you find them in the landscape at all.

yes i see boxwood all over the place used in landscaping but yes the more i think bout it they are in shady or not full sun areas that might be my problem

 

[BoostedBonsai]

This will be subject to the varietal selected as well, if you move to a shadier location you will know in a week or two by the color change.

i will do that once my shade cloth arrives thats might be my problem