GreenHab Report – February 14th

GreenHab Officer: Natalia Larrea

Environmental control: Heating and Cooling w/ ambient air (8 hrs)

Shade Cloth (40%)

Average temperatures:

Low: 17.5 °C

High: 26.5°C

Hours of supplemental light: 5 Hours

Daily water usage for crops: 12 gallons

Water in Blue Tank: ~ 252.5 gallons

Time(s) of watering for crops:


1) 09.00 AM 24.5° C / 28 %
2) 12.00 PM 25.2° C / 32 %
3) 14:40 PM 24.5° C / 38 %
4) 18:00 PM 20.6° C / 48 %

Changes to crops: New seedlings continue sprouting around the large tomato plant in the grow bed. Some plants exhibit potential nutrient deficit (see narrative below). The A. Thaliana started sprouting on the germination plate.

Narrative: Further seeds of A. Thaliana were washed and placed in germination plates using damp paper towel germinations last night (13th February). The plates were placed inside the incubator to maintain optimal environmental conditions. The A. Thaliana that was plated on Monday started sprouting as well and will be transferred to collected regolith samples tomorrow. We continued regolith characterization by investigating the pH of the sample. The samples were treated with a CaCl2-2H2O solution and de-ionized water results will be available in tomorrow’s report.

The GreenHab temperature was regulated throughout the day with the use of the heater at specific intervals of time. We conducted inventory in the GreenHab to identify which plants exhibit yellow pigmentation (i.e., possible indicator of nitrogen/nutrient deficiency in those pots). The following plants were identified as having a nutrient deficit (see attached pictures):

· Savory mix (some leaves started to turn yellow)

· Lettuce encore mix (some leaves exhibit slight yellow color)

· Lettuce leaf (some leaves started to turn yellow)

· Parsley (the plant is largely healthy, few leaves at the bottom started turning yellow).

· Fennel (the plant is largely healthy, few leaves at the bottom started turning yellow).

· Sugar snap peas (most plants turning yellow. Some drying)

· Cucumber (plants seem to be dead, as previously reported)

We prepared the plants nutrient employing the “Miracle-Gro” solution available in the GreenHab. We sprayed the solution sparingly at specific spots at the base of the affected plants. We will continue monitoring the situation to observe how plants react. It is anticipated we will repeat this process in the next two to three days.

Harvest: 2g parsley, 1g lemon basil, 1g fennel greens.

Support/supplies needed: None.

Copyright © The Mars Society. All rights reserved. | Main Site