This is the dahlia stem we planted horizontally three weeks ago to make it more drought-resistant. Shoots, being positively geotropic, grow upwards towards the light. Here we have several shoots, each springing from a node of the horizontal stem. Because these nodes are all at the same height, just below the soil surface, they have more equal access to its water reserves.
3 June 2011
Several Geotropic Shoots From Nodes Of Horizontal Dahlia Stem
This is the dahlia stem we planted horizontally three weeks ago to make it more drought-resistant. Shoots, being positively geotropic, grow upwards towards the light. Here we have several shoots, each springing from a node of the horizontal stem. Because these nodes are all at the same height, just below the soil surface, they have more equal access to its water reserves.
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