Ranunculus Fertiliser Schedule (Australia): Before, During & After Bloom

Feed lightly after sprouting, then regularly through active growth and bloom, and taper off as foliage fades. Start at half strength when shoots are 2–3 cm tall; switch to full strength every 10–14 days during peak growth; return to half strength for 3–4 weeks post-bloom; stop when leaves yellow for dormancy.

Don’t fertilise dormant corms or waterlog newly planted beds.
Sun + even moisture drive flower quality; fertiliser supports, but can’t replace these.
Containers: feed a little more often (nutrients leach faster) and flush salts every 4–6 weeks.
Target soil pH: 6.0–6.8 to keep micronutrients available and foliage green.

Use This: CompleteGrow All Purpose Liquid (NPK 20-20-20 + Micronutrients)

Balanced power: Even N-P-K feeds roots, foliage, and buds in sync for bigger, sturdier blooms.
Micros that matter: Iron, magnesium, boron, and manganese keep leaves green and stems strong.
Cool-season friendly: Water-soluble for fast uptake in cooler soils typical of the ranunculus cycle.
One-bottle plan: Same product from sprout to post-bloom recharge—simple and consistent.

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Exact Feeding Schedule (Rates, Timing & Climate Tracks)

Dilution & application

Half strength: 5 mL CompleteGrow per 1 L water.
Full strength: 10 mL per 1 L water.
Beds: 1–2 L of solution per m² (aim for the root zone).
Pots (≈30 cm): 1–1.5 L of solution until slight runoff.

By growth stage (adjust a few weeks by local climate)

Sprouting (2–3 weeks after planting): Begin half strength weekly once shoots reach 2–3 cm.
Active vegetative growth (late winter): Full strength every 10–14 days to build roots and stems.
Bud & bloom (spring): Continue full strength every 10–14 days; water early and feed soil (avoid petals).
Post-bloom recharge (3–4 weeks): Half strength every 2–3 weeks to refill corm reserves, then stop when foliage yellows.

Australia climate tracks

Region	Planting Window	Feed Rhythm (typical)
Cool/Southern (VIC, TAS, SA, southern NSW)	Apr–Jun	Half strength from sprout (May/Jun); full strength 10–14 days in Jul–Sep; post-bloom half strength late Sep–Oct.
Warm/Temperate (coastal NSW, WA, SE QLD)	Mar–May	Half strength from sprout (Apr); full strength 10–14 days May–Aug; post-bloom half strength late Aug–Sep.
Frost-prone/highland	After heavy frost risk	Mirror the cool track but shift ~2–4 weeks later; protect early growth, keep feeds light in cold snaps.

Pro tips & safeguards

Containers = faster leaching: Feed every 7–10 days at half to full strength; flush with plain water every 4–6 weeks.
Heat > 28 °C: Drop to half strength until the cool change; water early morning to reduce stress.
Leafy but few buds: Skip one feed, then resume at ½–¾ strength; ensure 6+ hours of sun.
Pale new leaves: Likely iron unavailability—keep pH 6.0–6.8; add one extra half-strength feed the following week.
Do not feed in storage: Corms are dormant—resume only after replanting and sprouting.

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Fertiliser & Dormancy FAQ

Do I fertilise at planting time?

No. Ranunculus corms are prone to rot in wet, nutrient-rich media. Wait until shoots are 2–3 cm tall, then begin half-strength feeding.

What’s the one best fertiliser to use all season?

CompleteGrow All Purpose Liquid (20-20-20 + micronutrients). It’s balanced, water-soluble, and covers root, leaf, and flower needs without product switching.

How often do I feed in pots vs garden beds?

Pots every 7–10 days (more leaching). Beds every 10–14 days. Flush pots with plain water every 4–6 weeks to prevent salt build-up.

Should I feed during flowering or pause?

Keep feeding at full strength every 10–14 days while in bloom—apply to soil, not petals. Consistent moisture and light feeding extend the display and stem quality.

When do I stop fertilising?

After 3–4 weeks of post-bloom half-strength feeds, stop once leaves naturally yellow. No feeds in storage.

Can I use manure, blood & bone, or high-nitrogen lawn food?

Avoid heavy nitrogen sources and raw manures that push foliage over flowers or increase rot risk. Use the balanced CompleteGrow liquid for predictable results.

Will fertiliser extend vase life of cut flowers?

Indirectly. Well-fed plants produce sturdier stems and better petals. For cut stems, harvest at bud-soft stage, use clean vases, and recut stems in clean water.