I am growing Walla Walla sweet onions, variety in farmers market is giant, but mine aren’t getting too big. Garden setting, no fertilizer, shade and cooler temperatures make a lot of difference!
Many onion types start to form a bulb when the temperature and the number of daylight hours reach certain levels. Varieties listed as short-day onions bulb up when the day length is between 12 and 14 hours. Long-day onions, on the other hand, begin to form a bulb when the day length is between 14 and 16 hours.
Walla Walla onions are Long day types, these start developing roots when day length is about 12-13 hours, right around June-July. Planting time has to be perfected so onions are ready to bulb up by June. Next year, I might plant these earlier and in more fertile space to get maximum yield. In all, not bad for the first year 🙂
How do I know when to harvest Onions?
Once fully developed and mature, onions drop tops, green tops bend over. Something like this –
It’s time to harvest onions….
and More potatoes, onions, arugula, few peas…
and some more…