Recent content by Delps8

Perhaps. There are a few "best VA 2000" lights. Can you post the exact model number or, perhaps, a link to a web page? The reason I'm asking is that the lights that have that basic description are quite different.

Perhaps but my hunch is that light levels are well down the list of issues. What is different about this grow than your previous grows? When you wrote "on day 19 " - when did you start counting days? Re. what to do with the light. The underlying issue is that I don't have a PPFD map so...

The manufacturer of your light doesn't provide a crucial piece of information about your light called the "PPFD map" so I can't give a solid answer on light. A good source of info is the manufacturer so you might want to check their website. Based on the values for the FC 4800 here, it looks...

The more info you provide, the easier it is to troubleshoot. Per @MickFoster, the temps for your grow are fairly low. 27° to 30°C will increase growth. Also, the combination of temperature and RH (and wind speed/fans) are the factors that drive how much water a plant gives off. The temp + RH...

That's what happened in the two grows (on another forum)-started out watering poorly and changed how they water but it was too late. :-(

I appreciate your comment. I misread your RH readings (a vision issue) and thought your RH was 76 to 78. " maintaining a decent vpd. " With RH at 70±, your VPD is great. Apologies for the confusion. I think that's the right approach. If a grower can't get a grow to "800 to 1000µmol, strain...

It's clear that there's a nutrient issue but I don't see anything that indicates that there's excess light. When a plan receives excess light, the leaves closest to the light source show the most sever reaction and, as you move away from the light source, the reaction to light levels falls off...

I don't recall the title of the video but, in one of the videos where the guest is a long time grower and his perspective was that they don't get concerned as long as an issue is impacting <20% of the plant. Of course experience ≠ expertise but it was an interesting anecdote. The proprietor...

It's a nutrient imbalance which is a symptom of insufficient nutrient availability and/or insufficient nutrient uptake. Easiest one to eliminate is the uptake piece - what are the temperature, RH, how many fans/wind speed, what light are you using, hang height, dimmer switch, and schedule. Big...

Ah, thanks for the explanation. The grow's looking great. Keep up the good work!

Doubtful that he'd keep track but, over the years since then, I wonder how many times he regretted his actions.

I'd drop my light level to about 40k. Out of interest, how are you measuring light?

Yes. I've found the yield estimates from seed vendors to be accurate/conservative. Typical values are 400-600gm/sq meter which is roughly 1 pound from 9 square feet of grow space and it's assumed that the canopy fills the grow space. You've got a tent that's 1 sq meter± and a canopy that...

The new light has a dimmer but you won't be using if for this grow. :-) "4th grow….maybe 5th." - appreciate the info. I was thinking "How does a newbie grow an amazing canopy like that!". Even though you're bringing in the new light about ⅓ through the grow, you'll get a good boost from it...