The experiment: to grow tomatoes on my balcony during a Sydney winter using seeds scraped from a store-bought tomato. (Although we’re well into spring now.)
There’s not much left to say about the experiment. I think we can all agree it was a success, albeit not a quick one. From seed planting in early May, it’s taken almost seven months for the tomatoes to reach the eating stage (I had five for lunch on Sunday!). So yes, seeds scraped from a store-bought tomato will germinate and the plants will grow in a Sydney winter, but they definitely prefer the spring with its overall warmer temperatures and longer days. (So do I, actually.)
Remember in September, I started to water one pot with milk and to not use chemical fertiliser? That experiment was not a success. The milk didn’t seem to hydrate the plants as well as water, and the pot is significantly heavier. Some digging with a stick revealed that the bottom 3 or 4 inches of soil has turned into a type of semi-solid swamp that released quite an unpleasant smell as I dug around. The liquid oozing from the drainage holes was a sort of thick green. (It’s the pot on the left in the photo below.) My advice: don’t do it!
The powdery mildew problem has not been cured by spraying the leaves with diluted milk, even with the addition of baking soda to the mix (a suggestion from Jude). You can see in the group photo below that these plants have a lot of naked stems! If you’re wondering why they haven’t gained much in height, the answer is that I’m pinching off their tops when they get to the height of the stakes because the plants generally sit on the balcony’s raised bed (visible at left) and there isn’t much vertical room.
Interestingly, the star performer of the five plants has been the runt that I retrieved from the rubbish because I felt sorry for it (the small black pot above). It was the first to flower and the first with ripening fruit, and is taller than two of what were apparently the four strongest ones.
I’m keeping a tally of harvested tomatoes, and when this is all over I’ll let you know how many I get.