Grow Diary​:​​ ​Spinach 'Perpetual'

PREMIER SEEDS DIRECT - Spinach - Perpetual - 14 Gram ~ 700 Seeds
  • Planting Depth: 1/2 inch. Spacing, Row: 12-18 inches. Spacing, plants: Sow 12-18 seeds per foot. Light: Sunny Location
  • Spinach germinates best in cool soil. Sow Mar - Apr & Sep – Oct. Sow about 6-12 seeds per foot, 1/2 inch deep, in rows 12-18 inches apart and thin when large enough. Gradually thin to 6-9 in apart as they grow.
  • Harvest young spinach leaves during growth and full-size. Protect during harsh cold spells and from winter birds for a harvest over winter.
  • Spinach grows on a wide range of soils if moist and fertile, but is sensitive to acidity.
  • Professional DEFRA licenced Quality Seed Supply only - Minimal packaging - Ziplock labelled bags - Instructions not attached - See details provided above for cultivation advice.
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    Test Plants: ​Spinach 'Perpetual'
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    Growth Medium: Aqua Vega - ​750ppm - pH 6.14
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    Location: ​Conservatory
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    ​Hydroponics Setup: ​10L Kratky hydroponics system

​Spinach 'Perpetual' seeds were planted in Root Riot Organic Starter Cubes and placed in a heated germinator for approximately a week. During that time, the seeds sprouted (3 days post-planting) and grew into healthy-looking seedlings. ​At the end of the week, the young plants were transferred to 10L Kratky hydroponics buckets containing 750ppm Aqua Vega nutrient media pH-ed to 6.14. 

The plants grew speedily producing ample edible leaves in under a month. Please note that ​a small portion of the ​leaves were regularly harvested for tasting purposes, and as a consequence,​ the pictures below show only a portion of the total growth ​that the Spinach plants were able to achieve during this ​growing cycle.

After about 56 days from seed start, it became clear that the plants were ​no longer growing ​as fast anymore, and since the nutrient media was also almost completely used up, the experiment was ​ended ​at this point. Measurement of the remaining media's concentration and pH revealed it to have a 'nutrient' concentration of 144ppm and a ​pH of 4.1, both of which may have contributed to the ​slow down of growth ​of the plants.

Overall, Spinach plants grow very well in the 10L Kratky hydroponics bucket system, but a larger volume / higher nutrient concentration setup ​will likely produce an even higher yield of edible produce if desired.

Day ​16

Day ​24

Day ​35

Day ​48

Day 57 - the roots