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I have about 3 or 4 cactus blocks that I found during an excursion, but it was really far from my base and there wasn't a lot of it. Instead of making another long excursion just to search for more cactus, is it possible to plant what little I have in such a way that it will grow more cactus blocks for me to harvest?

If so, what is required for cactus to grow? I know trees only need light. Wheat needs water within 4 blocks and light, and reeds need water adjacent to them. What are the requirements for cactus?

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up vote 19 down vote accepted

Cactus must be placed in sand, and not adjacent to another block. Diagonally adjacent is okay.

It will grow even in complete darkness, and does not need water.

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Catcus grows fully (three blocks height) in roughly one gameday. – badp Oct 9 '10 at 15:03
Are there any other requirements? Water, light, etc.? – StrixVaria Oct 9 '10 at 15:39
It's also worth noting that any snow on top of the cactus will halt its growth, so put a roof over it or a heat source nearby if you're in a wintery area. – Brant Oct 9 '10 at 17:13
@Strix: water is not required and moonlight is enough. – badp Oct 9 '10 at 17:38
Just tested it, and cactus does not need light to grow. Likewise with sugar cane, although sugar cane requires adjacent water. – Joe Dovahkiin Aug 28 '11 at 10:38

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