mojomon
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- Jun 27, 2005
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Working on my 2nd grow, 6 seedlings going on 1 week from sprout in rockwool, tray-type NFT system with about a 4-4.5 gal res.
When I did my first grow, the only thing I monitored was pH, as I didn't have a monitor for ppm. For this grow I recently purchased a Hanna multi-function meter with pH/EC/temp. Using the left-over nutes from my first grow about a year ago: GH MaxiGro (10-5-14) for veg & GH MaxiBloom (5-15-14) for flower. Both are powder mix, not liquid.
My questions:
1) For my size res, what are the average ppm readings I should be looking for when I start feeding and then as the plants grow? Are there any standard ratios for calculating this?
-I started using the meter right out of the box. Is the calibration it arrives with okay to start with, or should I be calibrating with a solution first?
2) Do these GH nutes sound like they are good ones, or should I consider something different? Is there a general rule of thumb on how long nutes can be stored before they "go bad"?
-Liquid -vs- powder mix? Advantages/disadvantages of either?
3) seedlings have green cotyledons and have produced first set of leaves, but seem to have stopped growing suddenly. I was planning on waiting at least two weeks from sprout prior to first feeding, but am now wondering if I shouldn't administer at least a diluted solution of nutes just to keep them going.
I appreciate any suggestions/comments/feedback---
Thanks,
MoJo
When I did my first grow, the only thing I monitored was pH, as I didn't have a monitor for ppm. For this grow I recently purchased a Hanna multi-function meter with pH/EC/temp. Using the left-over nutes from my first grow about a year ago: GH MaxiGro (10-5-14) for veg & GH MaxiBloom (5-15-14) for flower. Both are powder mix, not liquid.
My questions:
1) For my size res, what are the average ppm readings I should be looking for when I start feeding and then as the plants grow? Are there any standard ratios for calculating this?
-I started using the meter right out of the box. Is the calibration it arrives with okay to start with, or should I be calibrating with a solution first?
2) Do these GH nutes sound like they are good ones, or should I consider something different? Is there a general rule of thumb on how long nutes can be stored before they "go bad"?
-Liquid -vs- powder mix? Advantages/disadvantages of either?
3) seedlings have green cotyledons and have produced first set of leaves, but seem to have stopped growing suddenly. I was planning on waiting at least two weeks from sprout prior to first feeding, but am now wondering if I shouldn't administer at least a diluted solution of nutes just to keep them going.
I appreciate any suggestions/comments/feedback---
Thanks,
MoJo