| Re: Cracked stem...
Hmmm, I've never seen a cracked stem from a boron deficiency and it's not too common. Maybe something fell on it or you broke it? If so, just leave it buried under the soil and it'll start growing roots in about 2 weeks. Just don't mess with it, don't keep digging it up.
If it is caused by a boron deficiency, check your runoff ph and make sure it's ok. If it's fine take those pos sticks out, get some proper nutes and feed them. Those sticks will burn your roots and cause problems. I doubt it's a deficiency this early. What soil are you using? What's your ph @?
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