I’m fairly new to growing & just had my 3rd harvest. All of them have had the same airy buds. Everything was northern lights. I’m growing under a 600w light in a 30” x 32” x 64” space. I’m using general hydroponics nutrients in soil. The strain was northern lights. The buds at the very top were a little denser but not much. Everything else was very airy.
Any help would be greatly appreciated. @Mr. Grow It
Unfortunately, you made the same mistake I did as well as I'm sure lots of other peeps. The first light I bought was from amazon and It said "1000" watts, the bad part is that what they say is 1000 isn't exactly that. If you do alittle research you will see the marketing ploys that companies use to deceive people like yourself and I. Your light plays a MAJOR part in the density of yer buds. I was fortunate enough to purchase a high end light and I can tell you the difference is night and day. I hope this helps, good growing!
Which 600w grow light are you using? What's your feeding regime? What are your drying conditions and how do you cure?
@Mr. Grow It
1st crop flowered under a Bloomspect 600w LED
2nd & 3rd crop flowered under the Yintatech 600w LED w/veg & bloom switches
Feeding regimen: GH nutrients (ratios in tsp/5ml & Micro-Gro-Bloom order)
wk 1&2 1-1-1 wk 3-6 1-.5 -1.5 w6 1-0-1.5 w7 .5-0-1 wk 8&9 flush
last 2 days of wk 9, 48hrs complete darkness then cut
Drying conditions: hung in tent, complete darkness, try to maintain 70 deg/ 50%RH
Cure: in gal glass jars with Boveda 62%pks
@AllDay I would try different grow lights next time. When cannabis doesn't get the ideal PAR amount, it sometimes results in longer innernodes and/or airy buds can happen. The grow lights you're using are better suited for leafy greens such as lettuce, kale, bok choy, etc. For example, the Bloomspect outputs 720 PPFD dead-center @ 12". This is ok for flowering but it doesn't show a PAR chart where you can see PPFD values over the entire coverage area. I'd be willing to bet most of the footprint is only receiving 100-400 PPFD which is fine for seedling stage and vegetation stage but really not enough when in flowering. Biomass and structure is certainly negatively impacted if the plant is receiving less than ideal PAR.
The other things you mention sound fine. Except when drying you could try to keep around 60% RH instead which could help a little.
@Mr. Grow It So if I just bought this light I should return it?
https://www.amazon.com/gp/product/B07RV69N1G/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
What is the ideal PAR I should be looking for in a light?