newbie needs help! brownish spots

i am an extreme newbie when it comes to growing i have an outdoor plant that is starting to get brownish spots on the bottom leaves ive looked at other threads tht deal with this but i cant figure out which problem my plant has please help me!:sad:
 

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most likely a couple doses of botainacares Cal-Mag plus will cure that right up

or did you spill nutrients on it when watering ?

all the newer upper growth looks great

is the problem spreading ? or just stayed on those couple leafs ?
 
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