Hello, I am from Europe, Lithuania.
I growing pineapple, but something happens to its leaves. They became red. Can you help me?
Growing conditions:
Winter: 18-22 C temperature. Special grow light.
Summer: I keep in the greenhouse where is 50 C temperature. 23 at night. Sometimes I take it outside.
This summer we have hot weather here 25-36 C temperature, I keep it in direct sunlight.
Watering: winter - 2 times per month, summer, 1 time per week.

The change from indoor light to outdoor direct sunlight is too big a change for it. I suggest you keep it inside at all times. Temps may be too much for it, as well.

Your plant looks very healthy and so I would not be alarmed.
Did you start the plant from the top of a store bought pineapple?
The Pineapple is a Ananas comosus belonging to the Bromeliaease (Bromeliad) family.
Many cultivars exist with some producing edible fruit and others are strictly ornamental.

I brought it from the store. It was dying because the fruit was cut out. But started growing again, there are 2 plants from the one.
But it was green. The leaves were green, can anybody explain to me why the green has changed to the red. Will it be green again?

I wonder if it was not green because it was indoors with lower light. A lot of bromeliads turn color depending on the available light. The two new plants are pups or offsets which form after the mother plant has flowered. The mother plant will eventually die as her purpose has been fulfilled but it may produce still more young ones before it goes. I agree it looks healthy.

Plantage said:I brought it from the store. It was dying because the fruit was cut out. But started growing again, there are 2 plants from the one.
But it was green. The leaves were green, can anybody explain to me why the green has changed to the red. Will it be green again?

Pineapples need sun to produce fruit, I think this article can help you, scroll down to pineapple turning red, seems it needs some nutrients, it also list how to add nutrients to the soil. I agree yours looks healthy, just probably needs some help. Now if this is an ornamental pineapple the red coloring might just be a change from being in the sun, which ornamental will do naturally and it is perfectly fine, but seems you are growing the top from a store pineapple.

This is a pretty informative article.
https://www.tropicalpermacultu...

Pineapples grow abundantly in my homeland, and I find them under full sun, temps through the roof, humidity very high, rains a lot. Grown more in the cooler mountain regions.

Since it is now summer, I would water that plant daily. So far it looks quite okay to me. It is from the Bromeliad family, so it does like a lot of water during exceedingly hot conditions.

It would be better to be out of your greenhouse so there is much better airflow around it even if it is very hot outside.

I am leaning that it is of the ornamental type.
My rooted top from a store purchased fruit growing in full sun.



Here is a look at the fruit of a ornamental variety.



The entire group with mature size fruit.

There are some pineapple varieties that would change to red when exposed to sun and they are edible too. I wonder, how the fruit is going to look. Will it be red or regular yellow?
ScotTi, how is your red pineapple going? Remember the one we talked about?