🌍 Built for UK, USA, Canada & Worldwide Gardens Free Growing Guides for Every Region Love It or Your Money Back Secure Checkout Instant PDF Download Checked Against RHS, USDA & Agri-Food Canada Data Free Garden Layout Planner
🌍 Built for UK, USA, Canada & Worldwide Gardens Free Growing Guides for Every Region Love It or Your Money Back Secure Checkout Instant PDF Download Checked Against RHS, USDA & Agri-Food Canada Data Free Garden Layout Planner
Move through the SoilCommander growing library like a course: keep the navigation in place, open the next lesson, and build your garden plan step by step.
When to pick: Harvest leaves and leafy stems as a cut-and-come-again crop, cooked like spinach; flower clusters and small (about 1mm) seeds are also edible, seeds cooked whole. Avoid inorganic fertilisers, which cause nitrate concentration in the leaves (PFAF).
A different species from the site's other amaranths
Callaloo (Amaranthus viridis) is a genuinely distinct species from the already-published Grain Amaranth, Blood Amaranth and Love-Lies-Bleeding Amaranth -- grown for its leaves, not primarily for grain.
Across the Caribbean, "callaloo" most commonly refers to Amaranthus viridis or A. tricolor -- usually green-leaved, distinguishing it from red-leaved "Chinese spinach" amaranths.
An annual reaching about 0.5m (1ft 8in) tall, monoecious, wind-pollinated, self-fertile. Native to tropical North America (original habitat obscure), now a weed throughout warm regions globally. USDA zones 7-11, hardy to UK zone 9, frost tender; cannot grow in shade. Soil: light, medium or heavy, prefers well-drained fertile soil, mildly acidic to mildly alkaline pH. Sow seed in late spring direct or earlier indoors under glass; germination is usually rapid and good in warm soil, aided by an overnight temperature drop; cuttings root readily. Edible leaves (cooked like spinach), leafy stems, flower clusters, and small (about 1mm) seeds, cooked whole. Requires hot, sheltered conditions and moist soil. HAZARD: when grown on nitrogen-rich soils, concentrates nitrates in the leaves, a health concern including stomach cancer risk -- avoid inorganic fertilisers.
1 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.
Frequently Asked Questions
What soil pH do callaloos need?
A pH of about 6–7.5. That span reflects genuine variation between the authorities we cite rather than a single agreed figure — the References section lists each source's exact range.
What problems affect callaloos?
Our data links 1 disease and 3 pests to this crop. See the sections above for each one and how to manage it.
Plan next season before the problems start
This page gives you the thresholds; the planner turns them into your own calendar. It works from what you can observe and measure in your garden rather than from dates written for somebody else’s latitude.
Science-based growing guides · Thresholds that hold in any climate
This guide states the conditions the plant itself responds to — soil temperature, frost tolerance, day length — rather than dates, because the same calendar month means opposite seasons in the northern and southern hemispheres. Anything genuinely restricted to one part of the world is named as such rather than presented as universal. Written and maintained by our editorial team against international horticultural research and extension sources.
Sketch your exact plot shape, pick your crops, and get a spacing-accurate bed layout with companion pairings and a rotation plan. Spacing, companion pairings and rotation are the same in every climate and both hemispheres — pair the layout it gives you with when to plant to set your own timing from soil temperature.
