Question: Guava or Psidium guajava
About 5 years ago I got the seeds of Psidium guajava and I planted them, almost all of them sprouted, but with the passage of time, mainly because of the winter frosts (I live on the border between Lombardy and Piedmont), I only have one plant left that I jealously take care of it (every winter I take it inside the house and place it in front of a window facing south in an unheated room, during the summer I take it outside in full sun). Excluding the vase, it is almost a meter high and as I have already said, it would already have the age to bear fruit, but it has not yet happened, I wanted to ask what could be the reason. Maybe something is missing. As a fertilizer I use low-release ones and not enough because I am always afraid of exaggerating. It is often attacked by aphids that I fight with regular administrations of linseed oil mixed with the special soap.
Thanks for any advice you can give me.
Answer: Guava or Psidium guajava
the guajava is a fruit tree of South American origin, which is cultivated in tropical and subtropical places; in Italy there are small crops of this tree, in Sicily, therefore in areas with a decidedly mild winter climate, where frosts are only sporadic, short and of slight entity.
The psidium obtained from seed can begin to bear fruit after only two years from the moment they begin to sprout, but in climatic conditions that are not entirely favorable they can serve up to 6-8 years before the plant flowers.
It also happens with lemons that the winter spent at home causes the total or partial lack of flowers; this is because the climate in the home, although hot, is not entirely favorable to the development of fruit plants; mainly the problem is due to the lack of humidity in the air, since in the house the heating causes a very dry and dry air, like the one found in the garden in the middle of July.
In addition to this, for many plants it is not "normal" to spend a few months with high temperatures, drought, but few hours of brightness. For this reason it often happens that the plants grown in the apartment do not have the correct development and do not follow the normal course of the seasons. In fact, many succulents, if grown at home, do not produce any flowers; but the same can be said of dozens of plants grown in the apartment, such as the ficus, which produce neither fruit nor flowers in the home.
So maybe your psidium is still too young, or maybe I need to spend the winter outdoors, or in a cool place.
If possible, try to cultivate it, during the cold months, in a poorly heated area of the house, such as a stairwell, which is still bright.
Or, if possible, try to grow your sapling in a cold greenhouse, or even outdoors, but in an area sheltered from frost and very sunny, covering it with non-woven fabric in case of frost.
I live in Brescia, and my neighbor has an orange in the garden, which every year amazes us with flowers and fruits; how does?
Well, he planted the still young tree a couple of meters from the wall of the south-facing house, so that he enjoyed as many hours of possiible sunshine; in addition to this as soon as the weather warns that temperatures will drop, it fences the tree with frames that form a greenhouse, all around the plant. And now the tree is about thirty years old, and it's really beautiful.