A Shady Case Study: Localized Vapor Pressure Deficit (L-VPD)…
Sweet bud shots shady. All the ladies are looking mighty healthy.
A Casey Jones x CVK or Sensi Skunk would be so interesting, I don't know if you'd play with that. Regardless I am down for Shady's Breeding show with the those two studs.
Hmmm... Now those would be very interesting crosses although I'm leaning towards the Casey Jones x Sensi Skunk as my Sensi Skunk #2 is short statured and hopefully that would help slow down the CJ's explosive stretch... :thinking
Round 5 is insane! killing it shady! K+ thanks for ya help bro
Thx Mud Man! No worries and I look forward to your journal soon... :cool
Shady bro, those bud shots look great!!! That Chem's Sis really looks stellar man.
Can't wait to see those CVK's, got some of those waiting to be popped.
Btw... got the rh up to 55% in my ideal VPD range...shit is looking WAY better! Thanks again for the links!!!
Whaddup true grit!!! That's awesome news about your girls... :friday:I think you're gonna like this post. Wait, let me milk another bowl of Chem's Sis first... :bong2:
Shady you really be killing this shit, that Chemdog's Sister looks like see is the flame. bro you got some really nice strains man. im curious how you the old skool sensi star will turn out... i keep watching like always and enjoy the show buddy best wish and luck to you
once again though your:evilgrin0031: KILLING:evilgrin0031: it right now
Thx brah! You're too kind... BTW, I'm running Sensi Skunk... :giggle
those buds look awesome my dude!
Right on winta! They smell and smoke even better than they look... :mmm very potent this time. Slow cured FTW!!!
joining the party a lil late but niiice set up dude, one day when i grow up i want one just like it..
great results too looks like some killer :weed-sign:
Big up the Shady Ganj Bible.
Peace
Thx for stopping by bud! :D Hahaa, I may write a lot, but I do my best to post pictures with my replys... :fighting0085: Gotta keep things interesting, entertaining, and not repetitive.
Yo shady that Chemdog's Sister looks ridiculous! getting that technique down ay!:character0050:
Hell yeah! I love
Chemdog's Sister... :inlove
A Shady Case Study: Localized Vapor Pressure Deficit (L-VPD)… :nerd
There are several factors to a successful garden… IMVHO, First is great genetics, then comes a consistent and perfect atmosphere, and with those things pH, PPM/EC, nutrient profiles, different mediums, pot size in relation to plant size, and watering/feeding intervals are all critically important variables to be adjusted based on plant response and strain requirements. Of course research, experiments, and experience usually help me to work smarter and not harder…
This is simply a brief study on VPD. I’ve mentioned Vapor Pressure Deficit before in my 3rd Round journal and provided the following link to others:
And I’ve quoted the following paragraphs to summarize the concept:
If humidity is too low (i.e. high VPD), the stomata on the leaves tend to close in order to limit transpiration and prevent wilting. This closing of the stomata will also limit the rate of CO2 uptake and hence limit photosynthesis and consequently plant growth. Low humidity also reduces turgidity (water pressure within the plant cells) and this in turn also restricts growth. Blossom end rot in tomatoes and capsicum can also be attributed to low humidity (high VPD).
Conversely, if humidity is too high (i.e. low VPD) the stomata will fully open but even so the plants will be unable to evaporate enough water to carry minerals into the plant and so again, growth will be impeded and mineral deficiencies (particularly calcium) may occur. In addition, the plants may exhibit soft growth, fungal problems and mineral deficiency symptoms.
For a while now, I’ve been logging photos and details of a phenomenon I’ve noticed, which appears to be a localized vapor pressure deficit, which I will dub L-VPD. Simply stated as wind speed increases across a leaf’s surface, the localized humidity drops since warm air can hold more water vapor than cool air… So if you’re garden’s ambient environment is dialed-in, you can still encounter localized VPD problems. In my situation these problems occur within the immediate vicinity of my fans. So, while my garden is dialed-in, I still have a few leaves that appear to be showing deficiencies, but are simply damaged by high L-VPD.
Alright enough talk, let’s look at some photos. I’ll start with a lower canopy leaf, of a Master x Bubba, in the middle of the tray. This looks healthy…
http://i858.invalid.com/albums/ab146/ShadyRoundFive/Shady%20Round%205/MxB-1.jpg
In stark contrast are the lower canopy leaves, of a Master x Bubba, directly adjacent to the fan…
http://i858.invalid.com/albums/ab146/ShadyRoundFive/Shady%20Round%205/MxBvpd1.jpg
Now a look at the upper canopy of that same MxB will show that she’s dialed-in…
http://i858.invalid.com/albums/ab146/ShadyRoundFive/Shady%20Round%205/MxBvpd0.jpg
Sometimes I wish there was a lower fan setting. Oh well, the rest of Round 5 is on point…
http://i858.invalid.com/albums/ab146/ShadyRoundFive/Shady%20Round%205/R5.jpg
Here’s some baby bud porn as well. Chem Valley Kush #4 with some fat leaves…
http://i858.invalid.com/albums/ab146/ShadyRoundFive/Shady%20Round%205/CVK4.jpg
And Raskal’s OG #2 starting to shine…
http://i858.invalid.com/albums/ab146/ShadyRoundFive/Shady%20Round%205/ROG2.jpg
Last, but certainly not least is the shady experiment with pollen. I’d appreciate any advice on proper collection and storage methods. I’m assuming I just keep going until it drops… :wondering
Here’s Sensi Skunk #2…
http://i858.invalid.com/albums/ab146/ShadyRoundFive/Shady%20Round%205/SS21.jpg
http://i858.invalid.com/albums/ab146/ShadyRoundFive/Shady%20Round%205/SS20.jpg
And the much taller Chem Valley Kush #4…
http://i858.invalid.com/albums/ab146/ShadyRoundFive/Shady%20Round%205/CVK32.jpg
http://i858.invalid.com/albums/ab146/ShadyRoundFive/Shady%20Round%205/CVK30-1.jpg
http://i858.invalid.com/albums/ab146/ShadyRoundFive/Shady%20Round%205/CVK31-1.jpg
:icon_dizzy: P.S. I’ve been hand watering all the hydro plants in Round 5 by hand and hope to finalize my automated setup early next week… Until then, hydroton plants get fed 3x a day, and the coco pots are typically once per day based on their weight and moisture loss… Every plant is getting an individual assessment before additional dosing.
