*Water Requirement Rating. The number describes the plant's general watering requirement, once the plant is well-established. These are general suggestions.

Keep an eye on your plants.

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• 0= no subsequent irrigation needed
• 1= water to root depth once every month
• 2= water to root depth once every two weeks
• 3= water to root depth every week
• 4= water to root depth when soil starts to dry

**can possibly survive in a colder zone
***technically a spreader, but spreads very slowly and cannot be described as invasive
^ These grasses put out very short rhizomes so technically they are not clump-forming. But their yearly spread is really just a widening of the clump and they are not considered to be invasive.