N2Outdrs

Ramitha, it would probably be better to make a seperate posting for each plant as that would make it easier for you to have an exact response for each plant. I believe the way you have done your posting will lead to some confusion.

Yuo plants are sword ferns, sego palm,possibly a mandavilla vine.

RRamitha, this is an Impatiens plant. Soft and herbatious. In California it's treated as an annual but can be cutback and given a shot of fertilizer and will come back as a perrenial.

Ramitha, I believe this is a Lantana. The flowers come in all colors. Bees and butterflies love them. This plant has a very pungent odor when you touch it. Lantana comes in forms that are "trailing" to "mounding"

Yes, it is a sedge. In California there is a product called "Sedge hammer" that is supposed to kill the nut. Google "getting rid of nut sedge" and I'm sure you will find other products. A friend of mine once told me the saying "Rushes are round, sedges have edges" and that help me initially identify plants such as this.