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Hi all, For a relatively small setup (say 2.5KW of lighting) and assuming the same yield, how much more power does a closed loop setup use vs an open loop setup? Obviously the main extra draw in closed loop will be the AC unit. cheers.

Hi all, I have this wired plasticky shiny look to the surface of some of my leaves - would anyone know that’s going on? cheers.

Hi all, I hear that sulphur’s good for increasing terpene production. My plants never have a sulphur deficiency or any other, but I’d love to increase the terpenes without adding a false flavour. Has anyone tried this with success? And what would be a good way to go about this? Cheers.

After taking a cutting from someone else’s room (stupid), keeping it in my propagator and subsequently getting rid of it, some of my plants started to exhibit some markings on the leaves and leaf curling that looks like pictures of cannabis plant viruses I’ve seen on the net. The odd thing is...

Hi, I’m getting strange stippled leaves with my seedlings. I do use a high intensity of light at this point (a 600w halide at 20” at the moment). Could this be an effect of using too much light?

Would anyone know what this could be? The plants are growing well, but the tips have this twisted leaf thing going on:

I’m starting a pheno hunt with a couple of strains. Is it better to keep the original plants that grew from seed as mums or can I use clones taken from those plants as mums? It would be quicker overall to do the latter, but I want to preserve the genetic qualities of the strain as best as possible.

Hi, I’ve been using Cannna coco nutrients for years and always have healthy plants to the end. However, I’m looking to improve quality and am trying to determine if I need to reduce nitrogen in the flower cycle to prevent chlorophyll levels getting too high. Canna coco doesn’t have separate...

Hi all, I’m always looking to improve my cure & I ran into this page: “https://howtogrowinvalid.com/autumn-color-effect/“ You stop feeding nitrogen 2 weeks before the end and flush as normal for the last five to seven days. It reduces the chlorophyll content in the buds, therefore...

Hi all, I’ve always rooted my clones in jiffy cubes. My clones root in 10-12 days. I’ve heard of people getting clones to root faster (7 days) using aeroponic propagators. Does the speed of a a clone’s roots appearing have any impact of eventual yield, assuming the roots are healthy &...

Hi all, I've grown for years, but am only just learning about curing. I've just cropped & filled some 1L Kilner jars about half full with bud (smells quite green) . The humidity in the jars is leveling out at about 64% so about right I think. My questions are: 1: I'll burp 3 times a day for...

Hi all, I've been growing successfully for years & get a consistent 1g per watt. However, I use a lot of light intensity - about 1000W of HPS lighting per square meter, with no CO2 enrichment. I have a lot of extraction power and the canopy is kept cool enough (no higher than 27 degrees. The...

Hi all, After many years growing, I’m doing my first grow from seeds. How soon after switching to 12/12 should I be able to clearly identify the male plants?

Hi all, I have some plants in Biobizz light soil that are about 5 weeks into veg. The Biobizz chart says to water with 2ml/L of their fish mix nutrient. After a couple of weeks of water at the start I started using the fish mix daily, but got a little nutrient burn after a week or two. I then...

Hi all, I have an issue that I’ve just identified - my humidifier had been depositing a layer of milky deposit over the leaves of my plants that is making them suffer. I realise this is the minerals in the humidifier’s water supply & I could stop this happening by using RO water in the...

Hi all, I’ve always grown using coco, but as a side grow I’m using soil. I’m used to my plants not drooping and the leaves very much reaching upwards. I’ve always seen this as a sign of good health. With this grow, sometimes the leaves go upwards, especially with the front 3 rows, but the row...

Hi all, I have to flush my soil plants to get rid of extra nutrients in the soil as I have tip burn. I don’t want to compact the soil - they’re in 10L pots, about 5 weeks old (still in veg). I’m thinking of flushing 4L per plant of ph adjusted water. I’m also thinking I should pour the water...

Hi all, I have a new strain which has some strange (to me) colouring. I’m growing my old strains alongside, none of which have any sign of infection. Would anyone know what this is? It is it just a natural expression of the strain?

Hi, I'm wondering if I'd lose weight going from HPS+CMH to all CMH? I'm keeping to about 3.7K either way - at the moment I have 4x600W HPS in checkerboard configuration with 4x315W CMH which is 3660W total. I'm looking to (possibly) go to 12x315W CMH which is 3780W. I'd like to go pure CMH for...

Hi all, I have a problem in my seedling room that I've never seen before - flecks of lighter coloured green on the leaves. After quite a few years of growing a certain strain, I'm finally letting that strain go and am introducing a new strain. I planted the seeds for the new strains 11 days...