Hello.
I am new to growing plants and I noticed some yellowing on the leaves of the plant as well as flowers dropping off. Any recommendations in how to fix this problem?

Hi Sylvana, and welcome. I'm going to assume you are in Sydney Australia, yes? Here are a few questions and hopefully some answers too:

Is the plant getting lots of sun? Tomatoes need at least 6 hours of direct sunlight per day. Commercial growers have tomatoes out in fields where they get sun from dawn to dusk.

How are you fertilizing it? They grow fast and are quite heavy feeders too. For a tomato plant in a pot, a soluble tomato fertilizer (mix according to the package directions) once a week is not too much.

How deep is the pot you have it planted in? They need about a foot of soil depth for their roots to form properly. Looks like there's some room in the pot for more soil - don't pile it on top, lift the plant out, put new potting soil in the bottom, water it, and put the plant back in on top of the new soil.

Are you watering it every day, enough that the water flows through and drains out the bottomof the pot (soaking all the soil thoroughly? Again, when it's growing fast in warm weather and making fruit it is a hard-working plant and needs to never be dry.

Good advice from Elaine but a couple more thoughts:

Don't lift the tomato, add more soil and bury some stem. The tomato will root along the stem resulting in a healthier plant.

It could be that your plant is not big enough to support more fruits. Be patient and let it grow.

A tomato needs at least a 5 gallon pot.

Welcome to NGA, @Sylvana .

I definitely agree with burying more of the stem of the plant -- whether or not it needs a larger pot probably depends on what variety of tomato it is; there are "patio-type" tomatoes that could be happy in a fairly small pot, but the majority should have a lot more room for their roots than yours appears to have at present. (When I pulled my tomato plants out of the ground recently their roots were well over 6 feet long!)

Happy gardening -- I'm very jealous of the fact that your gardening season is beginning and mine is done!

Hello Everyone !
Thank you for the feedback !

Yes I am from Sydney Australia ! The weather is still fairly cool ranging from 60-77 F I actually live in an apartment and so I leave my plants on the balcony. I found that the sunlight only hits the balcony from about 0730 to 1230 (rough estimation) so I'm not sure if there is actually enough sunlight that shines on the plant.
The pot size as well as fertilizer is okay, I water with soluble fertilizer about twice a week and the pot is about a foot in depth.
There is also some obvious signs of small bite marks on some of the leaves. I was recommended by a friend to not use any sort of insecticide but to let it grow naturally. Any thoughts on that ?

Thanks again for the feedback !

If the damage to the leaves is minor I wouldn't spray with anything; could you show us a photo of the "bite marks" ?

Of course it's best to grow your edible plants as naturally as possible. But there are approved, non-toxic methods to keep caterpillars and other chewing insects from decimating your plants.

First you need to determine what it is that is eating your leaves. If you let it get too much of the foliage, the plant will surely die. A caterpillar is the most likely culprit but it could also be a grasshopper. Treatment is different for the two.

Check very carefully on the undersides of the leaves for a little worm-like thing. Caterpillars can't escape once they are feeding on your plant, like a grasshopper can.