Ramps

Quick facts

Category

herbs soft

Difficulty

advanced

Days to harvest

1095 to 2190 days

Harvest type

single harvest then replant

Spacing

15 cm between plants

Environment

Temperature

0–20°C

pH

5.5 to 7

EC (hydroponic)

0.8 to 1.4 mS/cm

Daily light

4 to 10 mol/m²/day

Climate and zones

USDA zones

3 to 7 (winter low around -40°C or warmer)

Frost tolerance

very hardy (survives deep cold)

Season

cool (spring and fall crops)

Viable growing environments:

• outdoor year-round (in zone)

USDA zone bounds reflect outdoor year-round survival. Anywhere outside the bounded zone range, this crop still grows as an annual in the warm months (outdoor_seasonal), under cover (greenhouse), or indoors under lights.

Growing systems

Ramps works in:

• soil bed

Growing media

The substrate the roots sit in. Choice depends on the system (clay pebbles don't fit NFT channels; rockwool isn't used in media beds) and the crop (ramps works in the media listed below).

Bacterial surface area matters for aquaponics: clay pebbles, lava rock, and pumice double as biofilter substrate. Low-surface media (rockwool, perlite, pea gravel) work in hydroponics but need a separate biofilter in aquaponics.

Nutrient demand by stage

NPK ratios are relative weights at each growth stage; the nutrient mix calculator scales them to absolute grams or ml. EC targets shift through the plant's life: seedlings need a much lighter solution than fruiting adults.

Aquaponics suitability

Not recommended for pure aquaponics. Fish waste alone doesn't provide enough of the nutrients this crop demands (typically potassium, calcium, or boron). It can be grown in a hybrid system where the reservoir is supplemented with hydroponic-style nutrients, but expect to dose actively.

Care notes

Not a hydroponic crop in any meaningful sense. Ramps grow in forest soil ecology and depend on mycorrhizal relationships and specific shade, moisture, and temperature conditions that are essentially impossible to replicate in hydroponic systems. For aquaponics growers with adjacent woodland: plant ramp seeds or transplants in moist, shaded, deciduous forest areas near (not in) the system. Ramps need heavy shade (90%+ canopy cover), rich forest soil with thick leaf litter, consistent moisture, and 4-6 weeks of cold dormancy. Planting to first harvestable bulb: 5-7 years from seed, 3-4 years from transplanted bulbs. This extreme patience requirement is why wild harvest remains the primary supply method. Once established, a ramp patch is self-sustaining and expanding for decades if harvested sustainably. For home growers, planting a ramp patch in suitable woodland is a long-term investment that pays off in a unique, high-value spring harvest.

Further reading

• Best crops for hydroponic beginners
• The Kratky method: grow lettuce with zero electricity