Magnesium questions and more...

So my three outdoor plants have been doing well for quite sometime, but recently some rather strange stuff has happened. I aplogize in advance for the lack of pictures, my camera has been on the fritz for months.

1. Many of the fan leaves have recently died off, this didn't concern me that much , as I've been led to believe this is something fairly normal, however, some of the yellowing leaves have started to curve upwards at the tips. This, according a book of a freinds (it's from like, the 60's) , can be attributed to Magnesium (Mg) deficiency. How can I correct this, and should I bother considering how mature the plants seem to be?

2. The smallest of out three plants (only about three feet high, the others are 4 1/2 and 5 feet tall) is budding, where as the others are showing just small hairs and getting started. The smaller plant is however, the most healthy, aside from a worm that munched on a couple of it's leaves. Is it normal for the smallest plant to be budding first?

Any Help/Advice is welcome.

Get some micro fert.something with mag. obviously...
I don't think the yellowing leaves were caused by that depending on whether the leaves were getting enough sun or not.

Hey, Kannabis-

If your leaves are curling inward & upward, it IS likely to be an Mg deficiency. A quick fix is to water your plants with 1 tablespoon of epsom salts added per gallon of water. You should see an improvement within a couple of days. Since you're already into the flowering stage, be careful not to overdo it, as the salt accumulation will take longer to flush out of your plants at harvest. A magnesium deficiency won't kill them in their last few weeks, but make sure they have enough nutrients to make it through their final 2 weeks of flowering (during which you should be leaching, or flushing, all the crap out of the soil with plain water).

Don't worry about which plants start flowering first. When I first started out, I was convinced that male flowers always show first, but have grown strains where that is clearly not the case. Just pray they're all girls! :D