Pinecones In Bottom Of Pot

Will several mature pine cones placed in the bottom of a large pot, underneath the dirt (to make it lighter to move) produce anything that might harm the plant?
Would it cause the soil to become acid, alkaline, or neither?
Thanks in advance.
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Why would you want to put them in the put to begin with?
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You asked why would I want to put them in the pot to begin with? Answer: The pot is large & the so is the plant. It will have to be moved inside during the winter months. Filled with dirt, it would be too heavy for me to lift & transport. Therefore, if I replace the lower portion of dirt with a light weight material, I would be able to lift it to bring it inside.

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Seems to me that if you fill enough of the pot with pine cones, you may as well just use a smaller pot. Doesn't have to be smaller in all dimensions - get the same width, but a shorter pot. My other thought is that as the pine cones decompose, the soil's going to collapse. So...smaller pot?

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Carmen wrote:

Pine cones will dissolve over time. Try styrofoam "peanuts" instead.
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| Will several mature pine cones placed in the bottom of a large pot, | underneath the dirt (to make it lighter to move) produce anything that might | harm the plant? | | Would it cause the soil to become acid, alkaline, or neither? | | Thanks in advance. | | Pine 'needles' are often used for mulch. Around gardenias, they help retain moisture. Pine cones? Shouldn't harm...may cause water retention initially, until they rot and die...which would probably be quiet a while. I have a gardenia under a pine tree and it's doing really well. Gardenia's like acid. So I'm not sure what (other than partial shade) the pine tree does, but it does seem a most apros place for the gardenia.
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