Oregano lower leaves turning yellow

[Sweets777]

This is probably the third or fourth year that this oregano plant has made a full comeback, coming back either the same size or larger than before (I'm zone 7a)

Overall the plant looks healthy, and the buds are about to open and flower, but the lower two sets of leaves on some stems are yellow/pale green and seem to be dying and I'm curious if this is an overall indicator of a nutrition/water issue I can correct for.

I fertilized maybe once in late spring and tend not to fertilize herbs more than once during the growing season (2-3-1 fish emulsion). In the absence of rain I'll water twice a week. Let me know your thoughts!

 

[Chuck]

This is probably the third or fourth year that this oregano plant has made a full comeback, coming back either the same size or larger than before (I'm zone 7a)

Overall the plant looks healthy, and the buds are about to open and flower, but the lower two sets of leaves on some stems are yellow/pale green and seem to be dying and I'm curious if this is an overall indicator of a nutrition/water issue I can correct for.

I fertilized maybe once in late spring and tend not to fertilize herbs more than once during the growing season (2-3-1 fish emulsion). In the absence of rain I'll water twice a week. Let me know your thoughts!

You plant is in the beginning stage of chlorosis. The leaves are beginning to yellow with the veins still green. This is a sign of a mineral deficiency, not NPK. I would use either Chelated Iron or Liquid Seaweed as a soil drench. Chelated Iron works faster than the seaweed.

 

[Sweets777]

Right, probably a case of this soil getting naturally depleted over time I reckon given the multiple years of it growing in the same spot.

Thanks for the pointers Chuck!