Field of Science

Flowers and fruit - a short lesson

A flower/fruit garden question, one of TPP's favorite things.  The question was simple this person's cucumber plants had plenty of flowers, but was producing no fruit, no cucumbers.  This is definitely a problem that will probably get fixed shortly.  The reason this happens is that cucumbers have two kinds of flowers, the botanically naïve call the "male" and "female" but this is quite incorrect, although this understanding of things quite often prevails.  Superficially both flowers look a lot alike so that bees get fooled into visiting the rewardless female flowers.  Funny how many people don't notice this.  The botanical term for this is monoecious, technically one house (but two bedrooms is you want another understanding.)  So look closely at the flowers on your cucumbers.  The "female" flowers have little cucumbers just below the yellow perianth.  "Male" flowers don't.  Virtually all cucumbers start out male as these flowers are cheaper to make, but as the plant gets bigger, some female flowers appear, and if pollinated, begin developing into cucumbers, fruits that we eat at a juvenile stage.  The image borrowed from somewhere shows a male flower to the left and the female flower to the right.  The anthers and the stigma look a lot alike, so bees looking for pollen make mistakes, foraging errors that effect pollination.  Or you can do it yourself with a small brush.  Some varieties of cucumber only produce female flowers, so you must plant a pollinator plant  The seed packet will have some seeds dyed green so you can see the males, and if you don't do this (TPP made this mistake once.) you'll get lots of females but no fruit, unless you borrow some male flowers from a neighbors' garden.  If you don't understand why male & and female are wrong, here's link to a blog that explains what pollen really is 

No comments: