Growing 101

Growing 101

What Size Light do i need?

Wattage
Approx. lumen output
Garden area covered
Area covered with sunlight
250 watt
28,500
3′ x 3′/ 9 sq. feet
4′ x 4′/ 16 sq. feet
400 watt
50,000
4′ x 4′/ 16 sq. feet
6′ x 6′/ 36 sq. feet
430 watt
53,000
4′ x 4′/ 16 sq. feet
6′ x 6′/ 36 sq feet
600 watt
90,000
6′ x 6′/ 36 sq feet
9′ x 9′/ 81 sq. feet
1000 watt
140,000
8′ x 8′/ 64 sq. feet
12′ x 12′/ 144 sq. feet

 

What about the different colours and light spectrums?

White/blue = propagation (seeds/clones)  Blue = vegative (growth) Red = Flowering (bloom)

What do you need?

Red and Blue light is essential for plant growth. It is well known that chlorophyll, which is contained in the green leaves of plants performs photosynthesis. Red and Blue are the wavelengths most essential for photosynthesis. The blue absorption region is 430-450 nm and that of red is 650-670 nm.

Recent research suggests that the ideal balance is 92% red LEDs and 8% blue LEDs. Although the lamps we use have a higher percentage of blue LEDs and they work fine. Blue has a smaller influence than red light so anything between 1% and 20% of blue light can be selected, depending on your plants and their growth requirements. When choosing your lamp you want both colours with the same frequency and relative intensity per LED.

These days most LED Grow Lights only deliver the colours of light used by plants for efficient and healthy growth. By leaving out the wavelengths plants wont need they provide better energy efficiency than conventional grow lights.

Red Light
Red Light is in the vicinity of the first peak of a plants light absorption spectrum (660nm) and it contributes to the plant photosynthesis. Red light, when combined with blue light, encourages flowering. It can also be used in higher doses to stimulate flowering, seeding and fruiting.

Blue Light
Blue light is responsible primarily for vegetative growth (leaf). It is known that chlorophyll has the second distinct absorption peak in the vicinity of blue light wavelengths (450nm). The blue light is also indispensable to the morphologically healthy growth plant. There is also more sunlight energy in the blue-green wavelengths

 


 

What Size Fan do i need?
if you would like to calculate  the size of fan you require simply follow these instructions:

Measure the Height, Length and Width (in metres) of the growing environment.

Multiply together (H x L x W) to give the cubic meter volume.

Multiply this figure by 20.

This is the size of fan required to change the air 20 times in an hour.

Buy the fan slightly above the figure calculated if possible to ensure adequate ventilation.


What Size Carbon filter do i need?

The correct filter is ideally one that matches the cm3 measurement of your fan for example

4″ Budget Carbon Filter “160m3″ 100mm x 250mm = 4″ Rvk Extractor Fan – 100 mm A1 = “175m3

We recommend that you renew the air within your grow room once every 2-3 minutes (30-20 times per hour).

To understand which size carbon filter is appropriate, first you need to calculate the volume of your grow room using the following formula:

Grow room Width x Depth x Height = Volume, for example:

Grow room 1.2m Wide x 1.2m Deep x 1.8m High = 2.59 cubic metres (2.59m3)

Now that you have calculated your grow room’s volume, you now need to find out the recommended amount of air that needs to be renewed based on its volume. To do this use the following formula:

Grow Room Volume x Air exchanges = Recommended volume of air exchanges per hour, for example:

Grow room volume of 2.59m3 x 30 air exchanges per hour = 77.7 cubic metres per hour (77.7m3/hr), meaning that the 160m3/hr rated carbon filter is more than ideal for this size room.


 

 

What is the ideal temperature for plants?
Air temperature within the grow room should be between 77 and 83 degrees Fahrenheit. Water temperature should be between 68 and 72 degrees Fahrenheit.


Tell me about adding co2?

C02 should only be used when your lights are on, as plants only use CO2 during photosynthesis. C02 is most effective during the flowering stage, but BGH recommends using CO2 throughout the life of your plants for maximum results.

 

 


 

What Should My Ph Reading be?

optimum ph  for hydroponics being 5.8 and 6.5 for soil.
Different plants have different ph requirements, this is just a guidline.

 


 

 

Quick Reference Growing Guide

Week

1–2

2-3

3-4

5-6

7-8

9-10

11-12

Temp F/C

40–80f

50–80f

60-85f

60– 80f

60-80f

60-80f

60-90f

Ph

5.2-6.2

5.2-6.2

5.2-6.2

5.2-6.2

5.2-6.2

5.2-6.2

5.2.6.2

Ppm

700

840

1050

1120

1190

1400

1540

Humidity %

50-70

50-70

50-70

50-70

50-70

50-70

50-70

 

  Vegetative for Hydroponics
Growth Stage 0.5 Conversion (ppm) 0.7 Conversion (ppm) EC ( µS) pH
Clones/Seedlings 220-350 300-500 430-700 5.5-6.2
Week 1-2 400-550 600-800 850-1100 5.5-6.2
Week 3-4 550-700 800-1000 1100-1450 5.5-6.2
Flowering for Hydroponics
Week 1-2 700-850 1000-1200 1450-1700 5.5-6.2
Week 3-4 700-1000 1000-1400 1450-2000 5.5-6.2
Week 5-6 850-1000 1200-1400 1700-2000 5.5-6.2
Week 7-8 350-700 500-1000 700-1450 5.5-6.2