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Once a female has been chosen to breed, which criteria should I look for in a male to use for pollination? I know which strain I'd like to cross the female with, but I haven't as yet chosen a father. Is it best to just pick the fastest, healthiest growing male plant, or is there another way to...

Sativa strains (Thai, Colombian, Hawaiian, Mexican, Jamaican) naturally grow much closer to the equator than their Indica cousins and therefore will be more resistant to heat and humidity. However, I have found that keeping temps under control will be beneficial regardless of strain. Even...

A true weed nerd owns a pair of night-vision goggles so he can work in his grow room in darkness without disturbing his plants. He wears a pocket-protector while clipping, so he doesn't get resin stains on his shirt from his scissors. He likely owns a high-powered microscope so he get up close...

The tips of the leaves are burnt, suggesting nutrient burn, but the yellowing looks more like a ph imbalance. I would suggest re-potting at once with a higher quality soil. Organic soils are loaded with nutrients and often have quite high ph levels which are not suitable for seedlings. It will...

Is it just me, or does smoking a bowl send you directly to the toilet bowl? I mean just a couple of tokes and BAM!, there's that sudden urge to take a $hit. I guess it's the whole muscle relaxant effect, but I'll tell you, MJ never ceases to amaze me.

It looks like a PH imbalance. Have you checked the PH levels of your substrate mix? I had similar problems once with a plant I grew using a store bought organic mixture. The fan leaves would get brown spots on them, turn yellow and eventually drop. As it turns out, my substrate's ph level was at...

HID bulbs burn considerably hotter than any fluorescent bulb, whether it be a CFL or T5 bulb, and they require a separate ballast to operate. It's hard to really put a number on it, but if you've already got 400W of fluoro's running than it's hard to imagine a 400W HPS raising your temps by...

I understand the concept, but I don't really see the practicality of it. I understand cutting away leaves during vegetation if they are shading other parts of the plant, but clipping away too much of the foliage would not be beneficial to the plant. The problem lies in the intensity, or lack...

I put my clones directly into soil and then simply wait for new shoots or leaves to appear. If you've properly taken your cuttings and used a cloning powder or gel, you should see new growth in two weeks or less. Personally, I rarely, if ever lose cuttings anymore, but some strains can be more...

As long as you're providing your cuttings with sufficient warmth and humidity you'll be fine. If you're getting condensation inside the plastic lid that you're using to cover them, you should be good. Using a rooting hormone will speed up the process and improve success rate, but it's not...

If you have any questions or queries about growing or anything else the folks here at RIU are always willing to help. As with anything else, you have to sort through the bullshit to find out what really works, but this is a great place to start if you're interested in cultivation or just...

Welcome to RIU. Any friend of MJ is a friend of mine.

It's not nutrient burn, as the tips of your leaves would burn first and they look fine. It really just looks like you accidentally splashed some nutrient solution on you plant. I was a bit taken back by how green your plants are. It may just be a strain I'm not familiar with, but I might...

Don't let these fools scare you away from particular breeders. They've all got some excellent gear on offer, and at the same time there are strains in every breeders catalogue that can disappoint. GreenHouse actually has some really nice genetics, and Super Silver Haze is among their best. I've...

Exactly. The only problem with growing different strains is trying to keep your canopy level. This can be especially frustrating if you're growing some short Indica plants together with some tall lanky Sativa. Topping and LST will help, but it's time consuming. Some strains grow well together...

If you only need to cool a small space a few degrees, there are fans you can purchase that use ice water to blow cool air. They are perfect for cooling a small area. Just be sure not to point the fans at your hot bulbs and don't run it "lights out" during flowering as it will increase humidity...

The way I see it you have 3 optimal choices. You could run 2 x 1000W, 2 x 600W with supplemental CFL or 3 X 400W. I actually prefer to run supplemental lighting with my HID setups as it allows me to configure a more diverse color spectrum for the plants.

The best all-round Sativa I've found so far was "Apple Jack" by Seedism. It finished quick (about 63 days), smelled and tasted wonderful after a good cure and the yield, while not commercial strength, was decent. As for an Indica leaning variety, I'm partial to both Nirvana's Papaya and...

There are several things that can affect potency in MJ. Strain, phenotype, environment, ripeness, drying and curing. 1) Starting with quality genetics is paramount. Always purchase seeds from a reputable source and choose a strain which will flourish in your particular growing environment...

People just love to bitch and complain. Often their anger and frustration stem from their own inadequacies as a grower. How many novice growers do you think have posted threads on this very site complaining about bad genetics from particular breeders while omitting the fact that they flowered...