I couldn't wait to take a little peek underneath the pot. Now let us present to you the result after two months:
The 'normal' one
The covered one
These pictures are made at the same time, and reveal a clear contrast between the hidden, lighter and larger rhubarb, and the other plant that was exposed to sun and cold weather. What a difference! And what great colours! This experiment directly shows the impact of warmth on the growing speed of plants, and the influence of sunbeams on their colours (or chlorophyll level). Pretty awesome.
Stay tuned for the next experiment in which we will test the difference in texture and taste of our two rhubarb plants.