The poppy is a flowering plant available in both annual and perennial varieties. The plant produces large, brightly colored flowers with a ruffled texture. Poppy flowering plants range in size from 2 to 3 feet and grow well in containers, including indoors in a hydroponics water system. Collect poppy seedpods or purchase seeds to plant into the hydroponic system to enjoy year round poppy plants without the worry of outdoor soil disease or winter elements.
Soak 1-inch hydroponics rockwool cubes in a tray filled with 1-inch of lukewarm water for two hours. Place the soaked cubes in a growing tray and sow two poppy seeds into each cube to a depth of 1/8 to 1/4 inch.
Cover the growing track with clear plastic to create a greenhouse environment during the poppy seed germination process. Place the tray in an area that has indirect sunlight and a temperature of approximately 70 degrees F.
Thin the poppy seedlings once they reach a height of 1-inch by clipping off competing seedlings in each rockwool cube. Choose to clip the weaker of the two seedlings at the base of the stem.
Transplant the poppy seedlings into a hydroponics system once the first bud formation occurs. Place the 1-inch rockwool cube inside a larger rockwool cube sized to fit into the hydroponics system. Do not remove the seedling from the small rockwool cube, as this will damage the root system.
Add hydroponics nutrients to the system at a rate of three tablespoons for every 1-gallon of water flowing through the system. Use a nutrient that is rated for use with poppy flower plants. Verify the application rate listed on the package as it may vary with manufacturers.
Place grow lights over the poppy plants for indoor hydroponics systems. The poppy plants prefer high-pressure sodium lights to halide grow lights. Set the light 6 inches from the top of the poppy plant and raise it as the plant grows. Poppy plants grow best when given as much light as possible, preferably a minimum of 12 hour day lengths.