My best ink comes from Noodler's, and Gruene Cactus is one of them. Beautiful, vibrant and well behaved. It's not too blue, nor is it too yellow, it's (I'm really sorry about this) juuuuust right.
I'm using it in my green Lamy Safari with an extra-fine nib. Bought it just for this ink. I needed a writer and Lamy nibs seem to run a little freer than other nibs. This ink is wet enough that the match is near perfect. As it hits the page this ink has an emerald quality to it. On decent paper It doesn't feather, or bleed, and it dries fairly fast. As for Goulet Pens, they packed it and shipped it on Wednesday, and it was in my mailbox by Saturday morning. Usual great service! Thanks, Sandy!!

This is a beautiful green ink that reminds me of the bright but deep green of a the forest.

lovely green just what I wanted

I wanted ink the color of new grass, and this one beat the six or seven others I tested. I haven't taken a sample outside to compare with actual grass, for fear that it won't be a precise match, or for the worse fear that the grass won't be as green as the ink. Its behavior in a Lamy Safari (B) on pure white, satin finish Rhodia paper is perfect. It flows well in this workhorse pen, produces some shading and, as far as I can tell with an 8x lupe, no feathering. I haven't yet tried it in any of my other pens but I'm sure I will. P.S. Your website requires an answer to questions I'm not qualified to answer: Flow, Water Resistance and Dry Time. Did my best but wouldn't consider my answers scientific at all.

I just LOVE this green! Reminds me of spring time green! A nice juicy ink, but not too juicy :)

I was pleasantly surprised at the shading in this ink. It's definitely a wet ink. I have it inked up in my Esterbrook Estie with a medium nib and it writes so smoothly. I would recommend blotting paper with this ink. Its definitely a juicy writer.

I have purchased several bottles of Noodler's Ink over the years...and have always been pleasantly amazed at the color consistency of these fine products. My recent acquisition is no different!For fine Inks of the highest calibre...buy from Goulet.

I mainly use normal paper and was surprised to see shading even on that, I think this ink is really good even though it's not very well known.

My first Noodler's green. Beautiful true green with nice shading. Quick shipping and great packaging from Goulet Pens as usual.

I think it's a great color and Noodler's is great ink!

Makes you remember novels of Chesterton and Stephenson, really! Vintage bottle and original stylish label! Color is very vivid, and it is, really, my lovely color! Easily impregnated paper, and it is neccesary to be careful in ink dosing to make line thinner. Excellent product, and enthusiastically recommended!

Please excuse the implied expletive but my first thought after using the ink was 'holy ****.....green cactus is the perfect name for this color.'

This green ink is beautiful. It's well-behaved, flows smoothly, doesn't feather on good paper, dries quickly enough. It even has some kind of water resistance. I put it under the tap and then waited a little before using a paper towel to remove the excess water and there was still a line left on there. It probably wouldn't stay there to the ends of time like some other Noodler's inks, but if you spill your glass of water on it, there's a good chance that you'll still be able to see what was written if you clean it up quickly.

Id call it a kelly green. But that isnt nearly as interesting as the actual name :D

Choosing the right ink is pretty much a hit and miss experience for me, but this time around I got a hit on the first swing!! I have this in my new TWSBI Diamond 580 Green pen, and it matches the pen color nicely. I'm a lefty so I've quickly learned that I need a fast drying ink. Some of the reviews claimed that this was a fast drying ink, and they are spot on. It is a lefty's dream come true!! The color is just what I want, the flow is even and predictable with no noticeable feathering so far. I haven't spent enough time with it yet to see if it dries out in the nib too quickly, but I feel confident that it work just fine for my writing style.

I bought this about a month ago in a small shop at my grad school, it was a total impulse buy, I had just bought a noodlers pen and wanted to ink it up immediately and found the green color as an appealing, unique addition to my ink collection. I'm so happy with my purchase! It's a good basic green color, there isn't much shading that I've noticed, but i'm a lefty and tend not to push the flex in my noodlers pen too much for want of quick drying times. If you want an appealing basic green color, I am confident that you will be happy with this ink

This is about the color I think of when I hear Kelly Green. A stong green color with a very slight tinge of blue to it but no black tones.

This is a perfect green. Not to dark or light, and has a touch of vibrancy to it. Perfect for proofing my magazine.

This is my favorite green ink. I spent hours on Fountain Pen Network reading ink reviews to try to find the perfect green. I ordered this one after much deliberation, and I was not disappointed. This ink is a beautiful color, and behaves very well on good paper. This is going to be a permanent staple in my ink rotation.

This is a nice bright green ink. It brightens my mood when I write with it.

But writing with this ink is delightful. Very green, very well behaved. I love it.Side note, did y'all know that green is the preferred color for proofreaders and in journalism school, you are taught to use green pens for writing on copy? Crazy!

I'm very pleased with my purchase. The Gruene Cactus is a rich vibrant shade of green, and flowed smoothly from the pen!I'll happily purchase a refill or more!

A bright green! I purchased this ink expressly to mix it, which I did. I knew it would be a bright green (and it is), a bit brighter and yellower than crayola crayon green. It's a nice color, but a bit bright for me. It is well behaved. I mixed the bottle of Gruene Cactus with about 1/4 bottle of Noodler's Black and it made a delightful dark rich green that is very well behaved.

In the past few months that I've been a fountain pen user I've looked for a nice green ink as green is my favorite color. The color of this ink is exactly what I want, but the dry time is just simply too long for me to use in any regular way.

This is a really wonderful colour! When you think I want a green ink, this one should be near the top of the list. No other colours, just a nice, clean, mid-tone green. It's become my fiance's favourite ink.

Love this green .. not too dark or too light, just pops at you! A vibrant color.

I love this green! It's a beautiful color. And it shades well even with a Lamy Fine nib. Probably is not a great color for the office, but sure is wonderful in my journal, taking notes, and whatever! Flows beautifully. It's my current favorite green.

Not to bright and obnoxious. Dark enough to be taken seriously.

I was looking for a vibrant green ink that looked like the ink used on Harry Potter's Hogwarts invitations. This is not as dark and shiny -probably because it wasn't pen ink on the invite- but it's pretty good.

This is my favorite green - I use it all the time. It does take quite a while to dry, even on cheap paper - but it's worth it.

This ink changed my opinion on black-only. Writes much lighter than I was hoping, but it is very light emerald looking as it dries. Nice ink, love the samples.