How to grow Giant Rhubarb

Gunnera manicata

Dappled Sun
OR
Partial Sun
High

Plant out in a damp sunny shletered spot, preferably by the edge of water. It can be contained by planting in a large bucket.
The crown of the plant may be protected from winter frosts by bending the old leaves back over to cover the central crown

Growing Giant rhubarb from seed

Sow fresh seed in late summer, as soon as they are ripe. Germination can be irregular, two weeks to two months. Keep compost moist but not wet using a spray.

Sow at a depth of approx. 0.2 inches (0.5 cm) and aim for a distance of at least 9.75 feet (3.00 metres) between Giant rhubarb plants. Soil temperature should be kept higher than 20°C / 68°F to ensure good germination.

Transplanting Giant rhubarb

Overwinter seedlings in a cold frame. Keep damp.

As Giant rhubarb is hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.

How long does Giant rhubarb take to grow?

These estimates for how long Giant rhubarb takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.

Days to Germination How long does it take Giant rhubarb to germinate?: 60 days
Average 60 days | Min days | Max days (0)
Days to Transplant How long until I can plant out Giant rhubarb?: + days
Average days | Min days | Max days (0)
Days to Maturity How long until Giant rhubarb is ready for harvest / bloom?: + days
Average days | Min days | Max days (0)
Total Growing Days How long does it take to grow Giant rhubarb?: = days

Other names for Giant rhubarb

Dinosaur food