到澳洲可以带茶叶吗？

不放心的话，可以申报一下，一般都没什么问题。

申报是必须的,按照入境法律
不是"不放心的话","保险一点的话",才需要
入境卡明确问你有木有食物,或者植物,或者部分植物,你敢说茶叶不是吗?

支持Eric D的观点
给个官方解释，明确地以茶叶为例了：http://www.agriculture.gov.au/travelling/to-australia/arriving-in-australia-declare-it#food

On arrival

The following is not a complete list of items that you must declare on arrival. In many cases items you declare will be returned to you after inspection.

If biosecurity concerns are found during the inspection, a Biosecurity officer may give you the option of treating goods (at your cost), after treatment they will be returned to you.

Some items may be allowed in if accompanied by an Import Permit (issued by the department before your arrival) or with mandatory treatment in Australia (fees and charges apply). Alternatively you can drop them in quarantine bins at the airport.

Food

• airline food and snacks
• commercially prepared, cooked and raw food and ingredients
• dried fruit and vegetables
• instant noodles and rice
• packaged meals
• herbs and spices
• herbal and traditional medicines, remedies, tonics and herbal teas
• honey and other bee products
• snack foods

至于额度，算是一般类的个人使用商品：成人的额度在900刀以下，未成年人额度450刀以下，可免税带入，大于此数量就属于需要进口申报的层次了。一般个人使用的茶叶数量，到不了这级别的吧
source:Duty free concessions