
Heather
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on September 24, 2012
It may have been a lack of phosphorous or it may have been heavy soil or it may have been a lack of water. All of these can cause undersized bulbs on shallots. Have your soil tested and amend for phosphorous as needed. If you have heavy soil, try amending with organic rich material like compost. And make sure that your shallots are getting enough water, deeply enough throughout the growing season.
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