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“How so?”

you must be wondering. Well, I will explain: they are common plants, many of them incorporated to Brazil by the colonizers, some medicinal, others ornamental. Carl Von Linneus or Carolus Linnaeus (creator of the nomenclature method, Taxonomy), in 1751, created a garden to demonstrate the hours, where several flowering plants cultivated together in a circle, constituted a floral clock.

Linneus intended to demonstrate the circadian rhythms (vital rhythms) of the plants, as their flowers open and close at certain times of the day. The concept was proposed in a publication called Horologium florae, from the compendium of studies by the same author, called Botanical Philosophy.

As Linneus lived in Sweden, and some of these plants do not thrive here, I included in the list that I made some plants known in our country. However, it is important to point out that some differences between the timetables can occur because of the summer and winter time and the latitudes, changing the flowering, according to each location and the requirements of each plant.

Some of them, well known and mentioned in my last post, such as eleven o’clock (Portulaca grandiflora L.), which opens at the time that gives it its name, and others of them, common inhabitants of vacant lots and sidewalks, however, that are not used as ornamental plants because in Brazil they are considered invasive, as is the case of the sawdust and the lion’s tooth.

It is important to understand that Linneus proposed to prove the regularity in the rhythms of the plants’ life. Being a great scholar and naturalist of his time, the ornamental question was secondary.

In the list below, you can find the times when the flowers open (some are only with the scientific name).

Don’t you want to try to make a floral clock in your garden?

  • 3:00 – Tragopogon pratensis L.
  • 4:00 – Leontodon hispidum L.
  • 4:00 – 5:00 – Helminthotheca echioides L.
  • 4:00 – 5:00 – Cichorium intybus L. – Wild chicory
  • 4:00 – 5:00 – Crepis tectorum L.
  • 4:00 – 12:00 – Sonchus oleraceus – Sawdust
  • 5:00 – 9:00 – Taxaracun officinale Weber – Dandelion
  • 6:00 – Sonchus arvensis L. – Sawdust
  • 7:00 – 14:00 – Sonchus palustris
  • 7:00-10:00 – Lactucca sativa L- Lettuce
  • 7:00 – 16:00 – Calendula pluvialis L.- Calendula
  • 7:00 – 17:00 – Nymphaea alba L. – Nymphoea
  • 11:00 -15:00 – Ficoiderodododendro simsi- Postemeira flower, guaruj√° flower or public servant
  • 12:00 – Passiflora Ssp – Passion fruit
  • 14:00 – Anagalis arvensis – Red brush
  • 16:00 – Oxalis ssp – Clover, sourpuss
  • 17:00 – Mirabilis jalapa – Good night, jalapa
  • 18:00 – Ipomea alba, Moon flower
  • 21:00 – 24:00 – Epiphyllum oxypetalum – Queen of the night


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How lucky you are that you have your own garden, but you are also lucky that you have us with the right advice on growing fruit and vegetables. Learn how to make your garden safe for your children and how to win in an insect war