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How much room do bulbs need to grow?

14 years ago

Hello,

I was wondering how much room do tulips and narcissus and other type bulbs need to grow both depth-wise and on its sides? I have an area next to my house I want to fill but while digging after about 6-8" I hit concrete. Can bulb roots grow in this area? Thanks in advance to those who reply

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katob Z6ish, NE Pa
14 years ago
Do you mean solid concrete or some kind of concrete rubble? Solid concrete will be a drainage and root growth problem. You could plant the bulbs shallow and they might do well with maybe three inches of soil under them, but it doesn't sound like a long term successful planting spot.
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