Vegetables and Fruit forum: Tomato leaves have whitish spots

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Mar 5, 2018 4:33 AM CST
Hello all!

At the start of January, I was teaching my three-year old about tomatoes. She got really excited and wanted to plant a seed on the spot. So that's what we did. For a month the plant has been growing fast and looking healthy, but recently I've noticed some white/very light green spots on its leaves. I don't really know what could have caused it. Also, two leaves are hanging down, while all the rest is looking good. Does anybody know what this is and how I might solve it? I'm not really worried about the hanging leaves, but the white spots look rather strange. Thanks in advance! :)

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Name: Paul Fish
Brownville, Nebraska (Zone 5b)
Mar 5, 2018 9:45 PM CST
Your plants look like they may need some nutrients. For one thing, the pot is way too small for a tomato plant. As the plant was small the pot was OK. As the tomato grows it needs more room and needs to be transplanted into a bigger container. The pot should be at least 15 liters and up to 20 liters. Growing in containers remember to fertilize with a liquid plant food every ten days or so. Be sure the plant food is low nitrogen formula. It should be something like 5-15-15 or 8-25-25. High nitrogen will result in lots of green leaves but no flowers or fruit.

As you water, the nutrients will be flushed out of the container. Be sure there is a drain hole in the bottom so you do not saturate the soil. Water from the top and not into the dish at the bottom. Allow the soil to dry out between waterings.

White leaves is an indicator and soon without fertilization the leaves will begin to turn yellow.
Mar 6, 2018 2:19 AM CST
@PaulF Great tips, thank you! I have just transplanted the plant into a bigger container and thus added a lot of potting soil. On the bag of the potting soil it says that nutrients are provided for at least a month. Do you think it is necessary to add some extra fertilizer? Or would the nutrients in the potting soil be enough for some time?

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