Anyone growing or have grown GRAPEFRUIT?

has anyone noticed that grapefruit is a harder plant to keep happy and growing> is there any specific advice for this strain?
I am using the exact same fox farm nutes and ph balanced water to 6.5 when I feed and I am having some srious droop, then yellowing, then droop. I am not over watering or under watering. I am treating these two girls as I did my last grow that went beautifully and harvested beautifully with a great yield. I guess I am just scratching my head here and so I thought I would turn to my friends here. I will try to post pics tomorrow.
Elway

Haven't grown true grapefruit but for that nice GF flavor, the Sweet Tooth plants seem to be pretty tolerant of abuse. I got the SWT mix seconds from seedbay and whatever came up is doing great!

I've got 18 GP clones right now, who just started growing. After transplanting them into their 3 Gallon buckets, they took over a week to change at all! Now the're growing great, 1-2 inches a day! Im using SunSoil and Advanced Nutrients Grow/Bloom/Micro, as well as advanced nutrients Growth Excell. We had some droopage problems as well, but basically the watering schedule is about 200 ml's every other day in the three gallon pots. For drooping, I found, that they needed water more than anything else. Yellow is just Nitrogen difficiency, maybe you want to flush your plants. Also, if your room gets cold when the lights go off, it seems to cause droopage as well. Cannabis is an amazingly resiliant plant, as delicate as it is.

thanks.
I have been feeding only half dose of big grow from fox farms as they were young plants. maybe it'sd a combination of the cold at night and not enough nutes. Thanks guys!

well all i can say im veggin some grapefruit now.no serious problems just start slowly on nutes we all make those mistakes te he:stoned: im using canna a+b very efficient easy to use you just start easy on them.also use some oxy plus in your root zone.great results with this. its hard to overwater with this the reason being it delivers so much oxygen to the root zone they breathe so easily even in heavily moist soil. also it enables them to uptake nutrients so efficentely its unbelivable you get really lush growth.just flush your pots 3 times there capacity but on the last flush use a very weak nutrient solution . and start all over again my friend. good luck pal:bonghit: