We believe it’s better to see real results. Not just theory, but a step-by-step look at what actually happens when we turn on the lights and plant the seeds. That’s why we’re opening this space with the undisputed queen of aromatic herbs: basil.
In this article we walk through a complete grow cycle, from seed to harvest, based on a real grow log documented photo by photo. We’ll cover the key milestones, changes in nutrition (EC), and pH.
The beginning
Day 0 — February 8 | EC 150 ppm | pH 5.5 | Light: low
Everything starts here. At this stage, what matters most isn’t nutrients — it’s moisture. We place the seeds in the sponges (inert substrate) and immediately cover them with the plastic domes.
- The goal: create a “greenhouse effect” to keep humidity at 100%.
- The water: at 150 ppm we’re using essentially nutrient-free water. The seed has all the energy it needs to sprout on its own.
We have life!
Day 3 — February 11 | EC 300 ppm | pH 5.7
Only 3 days in and we’re already seeing sprouts. Those tiny leaves aren’t the true basil leaves — they’re the cotyledons. Once we see activity, we make the first adjustment:
- Nutrition: we raise EC to 300 ppm — a light dose, half of what’s recommended for a mature plant, enough to stimulate growth without burning the new roots.
Tip: If the sprouts are touching the plastic dome, it’s time to remove it.
Establishing the system
Day 13 — February 21 | EC 400 ppm | pH 5.6 | Light: medium/high
Ten days after sprouting, the plants already have their first true leaves and the root system is expanding beneath the surface.
- Light: we increase the intensity. Basil loves light and you need to prevent it from stretching (“leggy growth”) as it reaches for the lamp.
- Nutrition: we raise EC to 400 ppm. The plant is starting to demand more energy to build structure.
The vegetative explosion
Day 20 — February 28 | EC 500 ppm | pH 5.8
Look at the difference in just one week! This is where hydroponics shows its magic. The plants doubled in size and look lush, a bright vivid green. We raised EC to 500 ppm to match this accelerated growth. pH at 5.8 ensures that nitrogen — the key driver of green leaf production — is perfectly available.
Filling the space
Day 29 — March 8 | EC 600 ppm | pH 5.5
We’ve hit the one-month mark. The plants are now competing for space and light. The leaves are large and wide — a sign of excellent health and proper lighting. We bring nutrition up to 600 ppm. At this point the plant is consuming a lot of water and nutrients, so monitoring the tank level is essential.
The hydroponic jungle
Day 37 — March 16 | EC 750 ppm | pH 5.7
We’re in the home stretch. The foliage density is impressive. We raise the dose to 750 ppm, which is the standard for mature basil in compact systems.
Observation: At this stage water consumption is intense. A system with roots like these can drop the tank level quickly within just a couple of days.
Harvest
Day 44 — March 23 | EC 750 ppm | pH 5.8
We’ve reached the end of the cycle. The plants are touching the LED lamp. Why harvest now and not earlier? Because we want to prevent flowering — once basil flowers, the leaves turn bitter and smaller. By harvesting at this point (just over 6 weeks) we get the sweetest, most aromatic flavor and the most tender texture for pesto or salads
Grow log summary
A recap of the cycle’s key data:
| Parameter | Detail |
|---|---|
| Total time | 44 days from seed to harvest |
| pH range | 5.5 – 5.8 (ideal for nutrient absorption) |
| Progressive EC | From 150 ppm to 750 ppm |
The secret is in the progression: don’t give the plant all its food at once — scale up gradually as the plant grows.
What did you think of this grow log? Ready to try basil in your next cycle? We’d love to hear from you in the comments!