Lovage · Hiroshima, Hiroshima, Japan
When to plant lovage in Hiroshima
Main outdoor window
23 Mar - 13 Apr
The window this page is built around.
Timed from last spring frost
6 April
In Hiroshima, on your chosen risk.
Ready to pick
1 May - 30 Sep
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Hiroshima
Each window is a range, not a single day. Earlier in the range buys you a longer season; later in it buys you a safer one.
Start indoors
9 Feb - 2 Mar
Eight weeks before your last frost, under cover or on a windowsill.
Sow direct
23 Mar - 13 Apr
Two weeks before your last frost.
Plant out
20 Apr - 11 May
Two weeks after your last frost.
Harvest
1 May - 30 Sep
Lovage through the year
Against the frost risk in Hiroshima
Why these dates
Very hardy. Dies back entirely and reappears early in spring.
Seed packets and extension guides express timing as weeks either side of the last spring frost, because that is the only reference point that travels. Lovage are timed from 8 weeks before that frost for an indoor start, with planting out 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Hiroshima.
Hiroshima sits in zone 9a, which is milder than this crop wants, and a winter that never really arrives is its own problem. The dates below still describe the right time of year; the open question is survival rather than timing.
Do not expect a crop in the first year. A plant set out now should give its first worthwhile pick around year 2, and will then produce every year after that, which is what makes the planting decision worth getting right the first time.
Growing lovage in Hiroshima
When should I plant lovage in Hiroshima?
Aim for 23 Mar - 13 Apr in an average year. If you would rather not gamble on the weather, wait until 3-24 Apr - by then frost has finished in nine years out of ten.
When will lovage be ready to harvest in Hiroshima?
Expect to start picking around 1 May - 30 Sep, based on 80 to 100 days to maturity from the planting date calculated for this location.
How much frost will lovage tolerate?
Very hardy. Dies back entirely and reappears early in spring.