How Do You Grow Oran Berries in Heartgold?
It's pretty difficult to find specific berries in HeartGold and SoulSilver. Take as many Oran Berries as you can (if you have none, exchange a Blue Shard to the Juggler in the Violet City Pokemon Centre) and plant them in your Berry Pot. Keep planting until you have enough (which I believe is 10 berries).

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Considering this, how many Oran Berries does Miltank need?

7 Oran Berries

Secondly, where do you get Miltank in HeartGold? You can find Miltank on Route 39 which is just North of Olivine City. It is one of the more rare Pokemon available on the route, so you may have to search a bit to find it. Miltank is more common on Route 47, which can be found later in the game (it will be about lvl 35), so that is another option.

Similarly, you may ask, how long do Oran Berries take to grow?

12 hours

Where do you get berries in soul silver?

You can get berries from the juggler in violet city in exchange for shards and then grow them in your berry pots.

Related Question Answers

How many berries does Miltank need crystal?

Feed it 7 (that's 7, not 6 or 8) regular berries (Oran Berries in the later gens).
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David Miller

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