Papaver somniferum Is the opium poppy. Its the only strain of poppies that can get you high.
Start off with 12/12 light cycle... As the plant matures, it likes drier soil, longer days, and stronger sunlight than it did during earlier stages of growth. Just prior to and during flowering, warm daytime temperatures (68-75 degrees), cool nights (35-55 degrees), and dry conditions are preferred. After flowering, any rain or moisture will dilute the opium and make it less potent.
Flowering starts about 8-12 weeks after germination. 16 or more hours of sunlight a day is optimal when flowering. The important thing is that the plant gets lots of sunlight at this time. After flowering, petals will fall off the flower in 2 days to several weeks.
When the petals fall off, the seed capsules develop. The capsule will be ready to harvest about 14-20 days after the petals fall off.