Hey @erh.germany!

Thank you for the compliment, I'm trying my best here! :)

It's very challenging to grow these types of plants indoors during the winter, especially if heat levels aren't consistent or very high in the home.

Aside from giving them a lot of love, it requires some pretty demanding environmental factors. By demanding I mean extreme light intensity and warmth, utilizing enclosures. The lights I use are commercial grade and very powerful, utilizing light emitting diodes that are specifically dialed in for optimum light spectrums for plants.

I grow those sunflowers, aloe, succulents and pepper plants in a single tent with a two hundred and forty watt light panel. My bigger tent boasts a six hundred watt commercial grade LED (light emitting diode) light. This probably accounts for the vibrancy of the plants.

The lights themselves also generate a lot of heat, which is helpful during the winter season.

Seasons are emulated/controlled by light cycles with timers that turn the lights on/off at user specified time intervals. Most common cycles are 18/6 for vegetative growth, and 12/12 for flowering plants. Some plants of course will flower no matter how much light you give them, one example being the sunflowers.

My sunflower tent is running twenty four hours of light currently, where the bigger tent with the six hundred watt light is running twelve hours a day to support flowering plants that flower during season change.

If you're growing next to windows without grow lights, a crafty way to help them would be using something like a painters plastic (semi see-through) to make somewhat of a greenhouse enclosure, trapping heat and moisture, but other things could be utilized to make these enclosures. It may dampen the light they receive, so this could come with some drawbacks and may only be useful for certain plants. It's amazing your aloe doesn't mind the cooler temps, you must give it so much love.

I hope this helps, it certainly brings joy into the home to maintain plants like this. :)

Greetings from New York my friend. 🤗