How to optimize the growing and production of medicinal cannabis? And what is the importance of the 24hour temperature of your growing room / greenhouse in relation to the amount of light?

1. October 2020
René Corsten
+ 31 6-53374539
r.corsten@Delphy.nl
www.Delphy.nl
Optimizing the production of Medicinal
Cannabis with a perfect balance
between temperature & radiationsum

2. Introduction
René Corsten
r.corsten@delphy.nl
+31 6 53 37 45 39
Senior consultant
- Chrysanthemum
- Cutflowers
- Medicinal Cannabis

3. Humidity  → Temperature
Visiting LP’s there is a lot of attention on humidity in
preventing Botrytis, but less attention on temperature
General growing strategy is a low humidity & a high
temperature
But is this logical
3

4. 3 balances in optimizing the growth
of your Medicinal Cannabis
4
Energy balance
Water balance
Assimilate balance

5. Net assimilate balance
All 3 balances are important,
however for Delphy optimal
production starts with a
perfect assimilate balance
5

6. Assimilate balance
Photosynthesis (assimilation – making of
sugars)
- Light
- CO2
- Humidity
Respiration
(dissimilation –
burning of sugars
for energy)
- Temperature
6

7. Relation assimilation / dissimilation – temperature
→ More temperature is not a higher assimilation
→ More temperature is more dissimilation
→ A higher temperature with the same light, humidity & CO2 levels gives a
lower net assimilate balance
7

8. 8
24hour temp radiation radiation
department sum level Total Optimal
outside inside hours mol/m² joules/cm² 24hour temp
A very sunny day in a greenhouse Generative 3000 45,2 3000 28,5
A winter day in a greenhouse with 400 umol LED Generative 600 400 12 26,3 1748 25,4
Indoor growing with 600 umol LED Generative 600 12 25,9 1722 25,3
Indoor growing with 1000 umol LED Generative 1000 12 43,2 2870 28,2
Indoor growing with 600 umol LED Vegetative 600 18 38,9 2583 27,5
Indoor growing with 1000 umol LED Vegetative 1000 18 64,8 4306 31,8
radiation influence C per 1000 Joules 2,5
basic-temp C 21
18
20
22
24
26
28
30
150 350 550 750 950 1150 1350 1550 1750 1950 2150 2350 2550 2750 2950 3150 3350
etmaaltemp
stralingssom/dag
relatie etmaaltemperatuur en stralingssom

9. Why you should try to achieve a
higher/perfect net assimilate balance
A higher net assimilate balance = a healthier plant!
Surplus of sugars can be used for:
- Healthier leaves → less leave problems
- Healthier roots → better intake of nutrients
- Stronger flowers → less sensitive for pest and diseases
(Botrytis!)
- Higher ingredients (THC, CBD, Terpenes, ……. etc.)
Over all: a more resilient plant & a better medicine
9

11. 11

12. 10 minutes is short, a lot more can be told about the cultivation
of Medicinal Cannabis, for instance about:
• The influence of CO2 and Humidity on the net assimilate balance
• Night evaporation and Calcium transport
• Which technology is needed for a perfect climate control when
you grow indoor
• How to use your black-out screen in a greenhouse
• The influence of light and temperature strategies on the design of
the plant
• Making a good vital cutting with a good motherstock strategy
• The rooting of cuttings
• Pest and disease control
• Nutrient recipe strategy
• …………. etc
12

13. More information?
Make contact!
Delphy is your partner!
René Corsten
r.corsten@delphy.nl
+31 6 53 37 45 39