Wups! Sorry i meant there’s two balcony spaces just next to each other. I’ll change my description. Thanks heaps for the advice!

Remove what's there now and plant the same plant all the way across. A short variety of clumping bamboo would probably be perfect, though it can freeze. Consult a local horticulturist for the best plant with a vertical, sculptural habit for your climate.

Declutter and get a storage bench or tub with a lid to put away all your tools when they're not being used. Do you have space for a cute little cafe table and chairs? Could be super cute if they were a bright yellow or red, or whatever color you choose.

If the beds don't get much light, select plants that will do well in shade. Spend time at your local nursery and ask the staff lots of questions about gardening and what plants will work best for you.

And you don't have to keep any plants just because they are already there or if they're not doing well in that space. (Or you can, its your choice). Gardening can be a lot of trial and error. If you're not fond of something, give it away or compost it. There's too many great plants out there to have something taking up valuable space that's not "earning" its place. Enjoy!

Like some of the other advice givers, I would say a single plant all the way across would look better than a collection of disparate plants. You have to get something that will tolerate the conditions (cold, light, etc.) or it will fail. The watering can be adjusted, but probably "every day" is too much for anything. Get something easy to start with. I would consider annuals since their nature is to produce flowers and that's probably going to be the most attractive and interesting thing you could view from the inside ... or a colorful foliage plant that serves basically the same purpose but may last longer or be more durable. One advantage to annuals is that they eventually decline and need to be changed, allowing the opportunity to try something new. Sometimes this is how one discovers a plant they come to love. It's not going to cost a lot given that it's a limited size area.

I would agree with pulling out the existing plants and putting in a single solid row of something. Although I'm not completely familiar with your conditions, it seems to me you might be limited on light in that space, which could make it tough to get good performance out of flowering plants. I might recommend something like the snake plant (Sanseveria trifasciata). These are usually pretty easy to find, inexpensive, usually pretty hard to kill, plus that they grow so upright might mean that you could tuck some little succulents or other fun things in at the base for more interest/color.

Citrus and chiles are generally full-sun plants and will struggle in such low light conditions. For flowers, you will have to find shade lovers such as begonias, fuschias, or impatiens and such. They may require more time than you have to give -- if so follow the suggestions above for tough plants to provide greenery.

Is the planter filled with gravel? Why is the level so low?

Hey guys thank you so much for all the great advice!! I knew i wouldnt be able to do this on my own. Much appreciated! @emmarene i really dont know to be honest! It was like that when we bought the apartment. There were plants already planted there before growing out of those soil/gravel. But one day I came home and my parents took them all out (no idea why). But i guess now it gives me the chance to make it pretty (before my parents come back).

I would be willing to bet that the original intention is not to plant directly into the planter but set pots in it such that they are hidden. However, there is now a mishmash of many pot sizes, with some of them being large and exposed. Seeing the pots detracts from the overall picture. The goal would be to adjust the elevation of whatever holds the pots such that they don't show, and that whatever is growing in them finishes concealing them. This should not really be hard to do. I would not think that the goal is to hide the background fence, but to merely conceal its lower portion (to no more than half its height) and attaching mechanism. Therefore, I'd be looking for something fairly low and bushy, spreading, possibly draping. But what's chosen will depend a lot on climate and conditions.

I don't know, Nicole, why you wouldn't be able to do this on your own. It's a matter of just buying some durable plants and dropping their pots into the slot. You would probably need to re-pot them first into slightly larger containers so their roots have some growing room. And then just water and fertilize them.