Oriental poppies do best in sunny areas in soil that's well-drained. They should not be placed in areas where soil stays wet for extended periods. They also prefer a soil that has a fairly neutral pH. High heat and humidity can cause the poppies to struggle.
You could try one light application of organic fertilizer, but keep in mind that oriental poppies need only one application of fertilizer a year.
They should be fertilized once a year.
For more information on the care of oriental poppies, please visit the following link: