Using dye on "delicate" hair

I color my hair and have for nearly 30 years. I use Clairol Nice N Easy or Clairol Ultress Ultimate Blonde. You can see by my siggy pic what my hair looks like.
Once she gets the color she likes, she should ONLY retouch the roots and NEVER the length unless she needs the entire head refreshed or go to a new color!!! I usually put the color on the roots, turn my head upside down and do the roots underneath too! Then put deep conditoner on the length while you wait for the color to set.
Then she just needs to treat her hair nicely, use a wide tooth comb, search and destroy for split ends, conditon after every shampoo, or even go to conditioner only for a while. She also needs to deep condition at least twice a month too.
Hope this helps!!!!

Truthfully I never remember the shade of Nice and Easy but it is the blondest one. Also in the Ultimate Blonde shade is 11G, don't remember the name. I buy which ever one is on sale at Walmart or CVS and there is not much difference in the shades.
I use John Freida Sheer Blonde for platinum blondes shampoo WHEN I shampoo, which is only once or twice a month. The rest of the time I do conditioner only, which is buy a cheapo shampoo like Suave Vanilla or White Rain (some fruity thing) and slather it on pretty thick scalp to ends, work it into the scalp like I'm actually shampooing, let it sit while I scrub the rest of me, then I rinse it out and put on a GOOD conditioner (John Freida, Tigi BedHead Moisture, Infusium 23) while I shave my legs etc, and rinse.
Then I apply oil (Monoi or John Freida Beach Blonde, I don't like Jojoba it's too heavy for me) on the ends while still wet (after twisting out the excess water, apply Infusium 23 Leave In and put on the towel while I lotion up my face and body.
I comb out with a wide tooth comb and put in two braids to sleep. Often wear braided or bunned during the day.
My natural color is what's referred to as dishwater blonde, that light brownish color with some blondey streaks that's kind of no color? It has gotten darker over the years, but my sister's hair is the same color, so have a good idea what it would look like if I grew out.
My hair is now in pretty good condition, I'd like my very ends to look better, they are kind of staggly but they are in good shape and I don't want to trim so am just waiting for the length to keep on growing!!!!!!
PS About the brassiness, if you think it is too brassy, buy the same shade in an "ash" shade. It should tone down the brassies really well. I use an ash shade about once every year to 18 months, usually in the winter to keep the brassys down.