250 seeds/pkg/3,25$ ... DIRECT SOWING: Scatter seeds in rock gardens in Aug. or May 20th when the soil is warm. Transplant or thin plants to 8 in/20 cm apart. Choose a loose porous soil in full sunlight. Move year old plants while they are in full bloom, during the spring. Clip foliage back after flowering cycle. Make divisions every third year. Plants flower 12 - 14 months after seeding.
In this Envisat image, acquired on 2 December 2011, a phytoplankton bloom swirls a figure-of-8 in the South Atlantic Ocean about 600 km east of the Falkland Islands. Different types and quantities of phytoplankton exhibit different colours, such as the blues and greens in this image
Here's an activity where teams of students learn about basic aerodynamics by constructing a rocket from a balloon propelled along a guide-string. They use this model to learn about Newton’s three laws of motion, examining the effect of different forces on the motion of the rocket.