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Growing Cilantro (Coriander)
in Plastic Bottles

A plastic bottles growing guide for cilantro (coriander) — container size, soil mix, watering, and the mistakes that quietly kill your yields.

🌱Easy difficulty
🪣1 gal min
📅21-45 days
☀Full Sun
⏱Low maintenance
Published

Quick answer: Cilantro (Coriander) grows well in plastic bottles. Use a 1-gallon, 8"-deep bag with well-drained; loamy; moderately fertile, pH 6.2-6.8. Daily check; the small volume and thin walls dry fast in any direct sun, and unlike fabric the moisture can't escape through the sides if drainage clogs. Feed weekly with 5-10-10. Expect harvest in 21-45 days, yielding 1-2 cups leaves; 1 oz seed.

Growing cilantro (coriander) in plastic bottles: why it works

Single-use bottles repurposed as planters offer the lowest possible material cost but the highest variability in shape, durability, and chemical safety.

For cilantro (coriander) specifically (Coriandrum sativum, Apiaceae family, Annual edible), this matters because cilantro (coriander) are heavy-rooted, high-water plants that need fast drainage. The controlled root environment lets you dial water and nutrients in tighter than open-ground growing allows.

"Get the plastic bottles substrate and water rhythm right and the rest is variety choice. Get either wrong and no cultivar saves you."

Cilantro (Coriander) container sizing, soil, and setup

Soil recipe

From the plastic bottles specialist playbook: 60% potting mix, 30% compost, 10% perlite.

Cilantro (Coriander)-specific tweak: cilantro (coriander) prefer pH 6.2–6.8, soil type well-drained; loamy; moderately fertile. Most quality potting mixes land in that range out of the bag — test before adjusting.

From empty pot to planted: the steps

  1. Choose your plastic bottles. 1-gallon minimum, 8" deep. Black is fine indoors; choose tan or grey for outdoor desert/hot-summer settings.
  2. Mix the soil. 60% potting mix, 30% compost, 10% perlite. Mix in a wheelbarrow or tarp before filling.
  3. Fill and transplant. Fill to 2 inches below the rim. Direct Sow.
  4. Water in. Soak until water drains through the fabric walls (yes, the sides will weep — that's normal).
  5. Position in sun. 4–6 hours direct Full Sun. Elevate dark-colored pots off hot concrete on a plant caddy.
  6. Mark feeding schedule. Begin weekly feeding 2 weeks after transplant with 5-10-10 fertilizer.

Best cilantro (coriander) varieties for plastic bottles

Plastic Bottles work for any cilantro (coriander) type, but the fast root-zone drying favors plants that handle steady deep watering. Top picks from breeders' lists (varieties verified via All-America Selections and university extension trials):

The watering rhythm for cilantro (coriander) in plastic bottles

Method baseline: Daily check; the small volume and thin walls dry fast in any direct sun, and unlike fabric the moisture can't escape through the sides if drainage clogs.

Cilantro (Coriander)-specific: the baseline holds for cilantro (coriander) (water_category: Medium, baseline 2 days), with adjustments:

Cilantro (Coriander) fertilizer routine for plastic bottles

Method baseline: Weekly quarter-strength liquid feed; the tiny soil volume is easy to over-fertilize.

Cilantro (Coriander)-specific: cilantro (coriander) are a light feeder. Use 5-10-10 (low-nitrogen, high-phosphorus/potassium) once flowers appear. High-nitrogen fertilizer in plastic bottles gives you a beautiful leafy plant with zero fruit. Start feeding 2 weeks after transplant, then weekly through the harvest window.

Where to put your plastic bottles so cilantro (coriander) thrives

Method baseline: 4-6 hours; full all-day sun overheats clear plastic and cooks the roots, so morning or filtered sun works better.

Cilantro (Coriander)-specific: cilantro (coriander) want 4–6 hours of Full Sun. South or west exposure is ideal. If you're growing on a balcony with only morning sun, choose compact varieties (more forgiving with less light) and skip the long-season heirlooms.

Fruit set: getting cilantro (coriander) to produce in plastic bottles

Cilantro (Coriander)s are self-pollinating — a single plant will set fruit on its own through wind or gentle shaking. First flowers typically appear 45 days after transplant. In plastic bottles, the air-pruned root system actually produces flowers a few days earlier than in rigid containers — a nice side bonus.

Pollination tip for indoor plastic bottles: hand-pollinate by tapping the cage gently once flowers open, or use an electric toothbrush against the stem for 1 second per cluster. Vibration shakes pollen loose like a bee would.

Common mistakes

Plastic Bottles mistakes (top 3)

  1. Using bottles that previously held cleaning chemicals.
  2. No drainage holes punched.
  3. Placing in full sun, growing algae inside.

Cilantro (Coriander) mistakes

  1. Transplanting (taproot dislikes disturbance).
  2. Planting in midsummer heat (bolts in days).
  3. Harvesting too much at once.
  4. Planting too thickly causing damping off.

Pests & diseases to watch

Common pests: aphids; armyworms; cutworms; whiteflies.

Common diseases: bacterial leaf spot; powdery mildew; damping off; root rot.

Plastic Bottles keeps soil-borne disease pressure low when the substrate is fresh and clean. Spider mites still come for dry-summer plants; mist the underside of leaves weekly if you see stippling.

Cilantro (Coriander) maintenance routine for plastic bottles

Method routine: Inspect for UV cracking and brittleness monthly, replace the bottle annually as plastic degrades, and rinse thoroughly if reused.

Cilantro (Coriander)-specific: Pinch flower buds to delay bolting and extend leaf harvest; let some plants flower for coriander seed Growth rate: Fast.

Harvesting cilantro (coriander) grown in plastic bottles

Expect 1-2 cups leaves; 1 oz seed in plastic bottles (roughly 70-80% of ground-grown yield). Harvest window: 21 days from first ripe fruit. Standard harvest months: May; Jun; Sep; Oct; Nov; year-round indoors with grow lights.

What you harvest: leaves; seeds; stems; roots. Culinary uses: Fresh in salsa; guacamole; curries; chutneys; Vietnamese pho; tacos; coriander seed in pickling; baking; spice blends

Wildlife & pet safety

Wildlife value: bees; hoverflies; beneficial wasps; lacewings attracted to flowers; supports beneficial insect populations. Originally from Southern Europe; Northern Africa; Western Asia.

Deer resistant: Yes · Rabbit resistant: Yes. Elevated containers on a balcony or fenced patio solve deer/rabbit pressure naturally.
Pet safety: Toxic to cats: No · Toxic to dogs: No. Non-toxic per ASPCA; safe for cats and dogs in small amounts; per ASPCA

Pro tip from the plastic bottles playbook

Cut a bottle in half horizontally and invert the top into the bottom - the cap end becomes a self-watering wick that pulls moisture up from a small reservoir in the base.

Grower's tip for Cilantro (Coriander)

Direct sow every 2-3 weeks for continuous harvest; grow in part shade during hot months to slow bolting; harvest outer leaves first; once it bolts let it flower and seed for coriander harvest and to attract beneficial insects

Cilantro (Coriander) in plastic bottles, answered

Can I use plastic bottles for cilantro (coriander) indoors?

Yes, with a saucer. Plastic Bottles weep water through the sides for the first few days after watering — protect indoor floors with a tray or saucer that catches sideways drips, not just bottom drainage. Light requirement: 4–6 hours of Full Sun, so plan supplemental grow lights for low-light rooms.

What size plastic bottles do I need for cilantro (coriander)?

1 gallons absolute minimum, 8" deep. The practical sweet spot is 3 gallons for steady production. Larger is better for indeterminate or high-yield growing.

How often should I water cilantro (coriander) in plastic bottles?

Daily check; the small volume and thin walls dry fast in any direct sun, and unlike fabric the moisture can't escape through the sides if drainage clogs.

Will cilantro (coriander) grow as well in plastic bottles as in the ground?

Yield is roughly 70-80% of ground-grown for the same variety, but plant health is often better — fewer soil-borne disease problems and no competition from other roots. For most home growers, plastic bottles are a net win.

How long do plastic bottles last?

2-4 years outdoors before UV degrades the fabric. Up to 6 years if stored indoors during winter and dried completely before folding.

What soil mix works best for cilantro (coriander) in plastic bottles?

60% potting mix, 30% compost, 10% perlite. The extra perlite compensates for fabric's fast moisture loss while keeping the root zone aerated.

Do plastic bottles get too hot in summer?

Dark-colored plastic bottles can heat the soil 10-15°F above ambient in direct afternoon sun. Use tan or light grey fabric for hot climates, mulch the soil surface 3-4 inches deep with straw, and elevate pots off concrete or pavers on a plant caddy or wood block.

Can plastic bottles be reused across seasons?

Yes — rinse inside and out at season's end, dry completely before folding, store flat indoors. Expect 2-4 years of outdoor use before UV degrades the fabric. Replacements run $5-12 per pot in 3-packs.

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Sources & references

Climate, geographic, and toxicity data on this page come from public datasets. Cultivar profiles and growing recommendations draw on land-grant university extension research.