I mean shouldnt ppm be at least 900?
Here's all the things that can affect PPM numbers
- Each plant is different, and some want more nutrients than others
- Each nutrient system is different, and some are "stronger" and easier to burn your plants with. Chemical nutrients in particular burn a lot easier than organic nutrients. Imagine if water just had a bunch of inert dirt in it, it could have 2000 PPM and would have almost no nutrients in it, but 500 PPM of chemical nutrients could be enough to burn and kill your plant (since it's so easy to absorb the plant would take it all up at once).
- Different mediums hold onto nutrients differently (heavy soil holds onto nutrients very well and need overall lower levels of nutrients, while nutrients drain away easily in light soils)
- Every person's starting water is different. Your water could start with basically 0 PPM (Reverse Osmosis water) or 300 PPM (like my terrible tap water), which affects how the plant absorbs nutrients and what the final PPM should be
- Environment - for example plants need lower PPMs when it's hot or dry and they're drinking a lot
- To make things even more confusing, different TDS meters measure PPMs differently, and won't match with each other. So it's really hard to come to a "correct" PPM that applies to every grower.
My only other piece of advice is to closely watch the natural color of the top leaves on your plant once they hit about Week 5-6 of the flowering stage. When you have a really great and powerful LED like yours, it can be easy to cause early yellowing to your top leaves. Certain plants can get picky in the flowering stage and need the light further away than they did before. When I've grown under LEDs it's easy to forget to check the plants in natural light, and sometimes you might miss yellowing if it happens gradually over a few days or weeks. Once you hit about Week 6 of the flowering stage, your plants can get REALLY finicky so it's good to keep a close eye of how it looks in natural light
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That got really long, I'm not sure how!
The main point is your buds look very well developed for their age - a really great start to flowering!
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