Growing Asparagus

Jan F M A M J J A S O N Dec
    S   T              

(Best months for growing Asparagus in USA - Zone 5a regions)

S = Plant undercover in seed trays T = Plant out (transplant) seedlings

  • Easy to grow. Plant as crowns. Best planted at soil temperatures between 16°C and 30°C. (Show °F/in)
  • Space plants: 20 - 40 cm apart
  • Harvest in 2-3 years. Plant 'crowns' to harvest earlier .
  • Compatible with (can grow beside): Parsley, Basil, Nasturtiums, Lettuce
  • Avoid growing close to: Garlic, Onions, and root vegetables

Your comments and tips

07 Nov 21, Pam (USA - Zone 10a climate)
I have purple asparagus, about a 7 year old bed. I read to only harvest spears that are larger than a pencil, but if I do that the smaller ones turn into "bushes" and hide the larger spears. Is this the correct way to harvest and grow? Question 2: I read to only harvest them for a certain number of weeks and then when they start getting pencil thin, to stop harvesting. but this seems like such a short harvest season, and the plants still want to produce. It is as if my asparagus bed is bushy more than it is in the productive mode. Is this correct? Can I continue to harvest longer? Question 3: Can I plant the poisonous red balls and they will grow into new plants? I thought my old plants would reproduce, but my bed seems to be about the same annually. I just don't feel like a confident grower, and the sources I read don't seem to provide information specific enough for my needs. thank you
18 Feb 22, Vee (USA - Zone 10a climate)
What varieties can I grow in zone 10a? Jupiter, Florida
10 Nov 21, Anonymous (USA - Zone 5a climate)
Asparagus needs two things.1. It needs some ferns left at the end of growing season to feed and build the nutrient storage in the crown for the next season. 2. They also need fertiliser in the growing season. Here is what I do. I cut the ferns off end of winter, give a good watering, a good fertilising, then 6
19 Oct 21, Kimberley (Australia - temperate climate)
My first attempts at growing asparagus were from seedlings. Very slow growth and few spears. Then I put in Mary Washington crowns 2yrs old. The first year I harvested a handful of spears. This is the second year- I’ve had continuous harvest since a early spring. As suggested, I’ve let a few ferns grow so that the crowns can develop and will increase my feeding so I get more spears next year. I have boy and girl crowns. Do you recommend an all purpose fertiliser at this time ?
20 Oct 21, Anon (Australia - sub-tropical climate)
Asparagus takes about 4 years to be in good production. I assume when buying crowns they are 12 mths old (probably less). This is what I do sub tropical - mid August I cut the old ferns off, give the patch a good watering, then apply a generous amount of NPK of about 12-4-14, give a watering and then put 6 (??)
04 Sep 21, bill (New Zealand - temperate climate)
we have a asparagus plant that appeared in a place in our garden where we had not grown any last year produced 1 or 2 very thin spears that went to fern this year there is one normal size spear just coming up should we class this as 1st or 2nd year
07 Sep 21, (New Zealand - sub-tropical climate)
If it germinated approx 1 year ago it would be 1 year old. You need to really look after this plant with compost/manures/fertiliser and regular watering. You won't produce a decent crop until the 4th year. Also I suggest you have 3-6 plants if you want a decent amount of spears each couple of days.
03 Sep 21, Peter Wise (Australia - temperate climate)
Can you please tell me how to look after asparagus after growing it from seed since November 2020. How and when to fertilise. Live in melbourne thanks in advance
12 Sep 21, (Australia - temperate climate)
And from seed
07 Sep 21, (Australia - sub-tropical climate)
You generally plant the crowns/plants now early spring. Grow in full sun. Dig a hole 2-3 times the size of the pot they are in now, mix a little fertilise in the soil in the bottom of the hole, plant the asparagus and water well. If it is still coldish in Melbourne wait until next month. Water 2-3 times a week depending on how hot/cold it is and whether your soil is light or heavy. Mix some compost or manures into your soil if heavy. In the future - cut the ferns off in late winter, give a good watering, then give a good fertilising and put about 4-6
Showing 21 - 30 of 491 comments

I will be digging up crowns from an elderly friend's garden. They have been growing, as in, multiplying, over the years and now too many in the bed. I'm guessing to lift them in late winter (subtropics), however, I am not sure. The lifted crowns will then be shared by other people, so, are there any good instructions for re planting the crowns, when etc, please? Thank you very much and also thank you for your monthly email for planting, I have told so many people about your list. Wendy Strathearn Gympie Permaculture

- Wendy Strathearn

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