Amrita, these are very nice images, but could you number your posted images as this makes it easier to comment on them when they are numbered. I would caution you to watch the background. In the first one, I would either crop it a little closer or clone out the red flowers on the left and the one at the top right. For the second one, those "brown" structures are distracting - maybe a different angle would help.. For the third one, you have the "line" between the greenery and the brown background right through the middle of the main subject. In the fourth one, I would be tempted to clone out the orange flower on the lower right side of the image and I would also move the flower a bit to the left so that it is not right in the centre of the image.
One thing you can try and do is to experiment with different apertures so that your background is more out of focus then what you have shown here. The other aspect is that, where possible, never be satisfied with just one or two photos, shoot the flower from different angles to try and eliminate any background clutter. As well, don't just be satisfied with a landscape orientation, try a portrait orientation. This might have worked better in the second image. Hope this helps.
WesternGuy