Kinda wondering if there's going to reach a point all my indoor figs croak because of too much fertigation?

For several weeks now they have been getting one teaspoon per gallon of 10-6-18, with every watering.  They're growing like weeds.  Is this going to build up and kill them?  I don't know, seriously.

Thoughts?  

I go by foliage color and growth rate. I like enough for moderate to fast but not rampant growth. You'll not kill them with too much fertilizer unless you allow it to build up in the potting mix. I'd switch to fertilizer no more than once a week with plain water in between. That will leach out excess salts and slow the growth some.

As a reference: My young figs (i.e. <1yr old) live in a flood and drain hydroponic setup. The solution they are watered with has an EC of 2.2. And they love it.  some calculations tell me that what you are feeding your plants has an EC around 0.9.  So you're definitely safe.

If you're worried about salt build up - here's a quick tip. Any time you fertilize, you want to put enough solution on the plant that 10-15% runs out the bottom. So if you fed 1 Liter, you should find 100-150ml in the drip tray. That will eliminate salt buildup.

These are all in the sand experiment.  The grow bags sit in trays that I have to water, some twice daily as they take up all the water, so there is no excess. The growth is most definitely rampant and they are all a very nice, dark green with the first leaves they ever got still on except for a few Valley Black leaves I pulled early on due to rust.

I will start to alternate plain water and see how it goes.

When plants are as young as yours are rampant growth is ok as long as they won't outgrow your available space and light.  If you wont be able to keep them all well lit as they grow then use less fertilizer.  Or get 4 more HID lights   ;)

Hi,
It is my belief that with the sand, the excess of fertilizer will drain to the bottom plate.
So as long as roots don't reach the plate, you'll be safe.
One the roots reach the plate, I would every now and then remove and wash the plate.
I have yet to kill a fig tree from over fertilizing ... And man, do I try !
I use ashes, fertilizer, compost tea and manure ... and the trees still keep on growing more... When I'm too light ... They grow slooowly ...
You're using 10-6-18. I'd use 10/10/10 .

Time to rent a warehouse!

Thanks for comments.  I remember reading somewhere they said to fertilize heavy.  Now I kinda get just what that means.

Hi Charlie,
For me, those roots in the water and outside of the "potting mix" shouldn't exist.
Those roots for me mean lack of nutrients in the potting mix... Or are your pots that small ?
Normally your pots should be trimming those roots...
At some point I would cut those roots for the roots to stay inside of the grow bag.

Charlie, swing over to your local hydroponics shop and bend their ear on the algae issue. If it were me, I'd keep adding the juice!