Plants

Pyrethrum

How much to water the pyrethrum

Pyrethrum is also called Tanacetum cinerarifolium or Chrysanthenum cineralifolium and can be confused due to its jagged leaves. In fact, tansy is also a pesticide, but pyrethrum as an insecticide is not dangerous for humans or even for animals. For this reason it is also present in public gardens as well as in private ones. It is watered regularly and constantly in spring and summer, to keep its soil rather moist. However, it must be said that pyrethrumit lives well in any type of soil mixed with peat. To avoid the harmful stagnations that cause the rotting of the root system, it is advisable to add some clay as well. A special attention is recommended in summer because the watering must ensure humidity to the soil despite the considerable heat.


Pyrethrum seedlings can be purchased in nurseries to then be planted in gardens or in pots, to be kept on the terrace as an ornament and as a valid repellent against mosquitoes and insects. To reproduce the pyrethrum you can use the seed or practice the division of its tufts. It is a spontaneous plant and can usually be found in fertile soils and in sunny areas, but it is also cultivated in greenhouses to avoid dangerous climatic changes in temperature. In any case, sowing is carried out in March by placing the seeds in the soft and humid earth, while as regards cultivation by dividing the tufts, it must take place in spring. To transplant the pyrethrum take the now large plants to put in the containers; when they are fully grown they move to earth.

How to fertilize pyrethrum


The pyrethrum fertilization must be done twice every year and more precisely in March or April, that is in the period preceding flowering and in September or October which are the months preceding the winter frosts. You will have to use organic or granular fertilizer to be placed on the base of the plant. The granular fertilizer will be the one that is slowly released into the soil to ensure perfect and abundant flowering. In the end, the pireto looks like a nice round shaped bush. Its green leaves give off that scent so feared by insects and parasites. But it’s its simple flowers, with daisy-like flower heads and white petals with a yellow heart, that stand out. While the fruits are only small and brown achenes that contain a single seed inside.

Pyrethrum: Exposure and disease


Pyrethrum prefers sunny places, but it also adapts very well to semi-shady areas and withstands the cold of winter. Therefore it is a very resistant type of plant. However, it is subject to root rot if there are water stagnations on the ground. Since pyrethrum is an anti-parasitic plant, it does not fear any infestation, on the contrary it is itself an excellent insecticide. In fact, the flowers and leaves can be dried in a ventilated place and then reduced to powder. It is used safely as an anti-moth for the vegetable garden and other plants or to keep away flies and mosquitoes. The substance obtained from pyrethrum is also useful in agriculture as it has little toxicity. It is also rapidly biodegradable and therefore can also be used on fruit trees and vegetables,

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