I wonder if this really works… Cool science experiment for kids! Rainbow Roses Get white or cream colored long stem roses. (Carnations work well too). Cut the stem according to the picture, you will then place 4 glasses of food color dyed water together. Put one piece of stem per color and allow the flower to soak up different colors.
Sorry for the weird picture- Tip included on this site says that if you sprinkle baking soda on the edge of your garden between the grass and garden, that it will prevent the grass from growing into the garden area. Do this twice a year- in spring and fall and just enough to cover the soil lightly.