Search results

Humidity is not a major factor for most soil grows. Controlling the airflow, temperature and watering schedule is usually enough to neutralize the negative effects from less than ideal humidity. Where did you test the temperature? If it's 90 right under the lights but 70 in the rest of the...

The plants start needing weak nutrients when the three-bladed leaves start growing in. This is usually the point where they are transplanted from an inert seed-starter medium into nutritious soil. If they are moved into fertile soil with some of everything they need, no extra nutrients need be...

First off, we aren't currently talking about what an ideal air circulation system might be, we're just choosing between the two options you listed. There of course can be some better setups depending on what resources are available and what your priorities are. The general reason to put...

Since mother plants stay in their soil for long periods and are usually kept as small as possible, it's not imperative to add ferts to their soil mixes. Teas can be made from Bat & Seabird Guanos; Bone, Blood & Kelp Meals; and nutritious ashes. Cottonseed meal is acidic and a good source of...

If the filter noticeably decreases the airflow of the fan, you put the fan on the filter. If the filter is free-flowing enough not to considerably impede your fan's airflow, you put the fan after the lamp.

It looks like Phosphorus deficiency, at least primarily. Try to take whole-plant pics if you're able, as they're often necessary for a solid diagnosis. Have a look at the oldest leaves; the pod leaves and very first single- & three- bladed leaves. Those get hit first when there's a toxicity.

We assume you're asking how it works when putting drops that change color to show pH into a non-clear liquid. Use a small amount of test liquid and watch very closely in the light when the drops hit the liquid sample. A magnifying glass may help for some. The drops change color as soon as they...

While we can't see all of the details of the plants in the pics, they look fine. Slight overwatering can cause slow growth. Be sure to let the top half of the soil dry out completely before watering. Healthy, mature plants can survive for weeks without any water at all. The light intensity is...

The Fish Emulsion is a good source of Nitrogen, but you also need sources of P & K. Bat & Seabird Guanos can be found with alot of Phosphorus, Nitrogen or both, as well as a host of micronutrients. Bone Meal is a great source of P & Ca as well. Kelp & Seaweed fertilizers usually have some...

Every lamp has it's "growth zone," which is the distance away that its light will support healthy plant growth, minus the minimum distance the plants need to be from the bulb. Here's a graph illustrating the strength of different wattage lamps at various distances. As you can see, a 150w...

Chemical pH drops should never go bad if in a sealed container. To test, you just use it on liquids that you know the pH of. The pH's of most household liquids can be found online.

Standard magnetic 600w ballasts run about 105$ + shipping. There are some under a hundred but are often poor quality.

With enough airflow through your lamp & on your plants, the temperature in the room should be very nearly the same as at the plants. You at least need more air blowing through the lamp as Kevin mentioned.

Sorry, my fault

Clones don't need any nutrients to root. Their lower fan leaves will yellow and die as the clones feed on them to grow roots.

Yellowing along the leaf blade edges is often Potassium deficiency. It can also make the leaves feel thin and papery. Pics would help alot.

No. Lower wattage than normal can be done because H.I.D. bulbs are designed to slowly warm up- that's what the ballast is for. So, a 600w lamp goes through a phase where it uses 400w as it's turning on. What you were suggesting just asks it do something for a long period that it's already...

Yes but it won't be as bright as a 400w bulb in the same setup and you'd have a much higher risk of failure. It's essentially trying to use an HPS with a dimmer.

It's made into a tea and instead of using plain water to soak the solid fertilizer in, an acidic liquid is used. The acid then neutralizes the alkalinity as the nutrients soak into the water. We're still working out the exact amount of acidifier to use but it's close to 1/2tsp of pH Down per...

Some of the best organic fertilizers include Bat & Seabird Guanos; Bone, Blood & Kelp Meals; Maxicrop soluble seaweed powder; Fish Emulsion; Worm Castings and Palm Bunch Ash (0-0-30). Most garden centers carry this stuff. The Palm Ash is found here...