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- From: pharvey@quack.sac.ca.us (Paul Harvey)
- Subject: Re: Non-flowering citrus tree
- Message-ID: <fVy1c8i@quack.sac.ca.us>
- Organization: The Duck Pond public unix: +1 408 249 9630, log in as 'guest'.
- References: <BxwzAG.I05@usenet.ucs.indiana.edu>
- Date: 21 Nov 1992 02:48:08 UTC
- Lines: 39
-
- In article <BxwzAG.I05@usenet.ucs.indiana.edu>
- jereese@silver.ucs.indiana.edu (jean reese) writes:
- >My husband has a grapefruit tree he grew from a seed 12 years ago. It's
- >pretty tall now, and healthy, but does not flower and never has. (Therefore,
- >no fruit.) We've given it fertilizer and left it outside over the summers,
- >but no response. Where did we go wrong?
-
- 1. Water
- Add sufficient water such that some drains from bottom and all soil
- appears to be wet. Then wait. The top soil should dry out and eventually
- you should get a sign from the plant, mild leaf wilt, that it needs
- water again. This mild drought stress is important, it will incourage
- the plant to flower. Repeat this water cycle again. In other words,
- water only when the plant needs it and water heavily. Citrus is very
- drought tolerant and will eventually drops its leaves under severe
- stress and grow new ones when the water returns.
-
- 2. Sun
- Full Sun, or as much as you can get.
-
- 3. Fertilizer
- Don't. Unless you see signs of nutrient deficiency when the leaves start
- becoming yellowish. Too much fertilizer forces growth and no flowering.
-
- 4. Winter Chill
- Many citrus are pseudo-Mediterranean plants and perform poorly in the
- tropics or indoor climates. Cool winter temps will aid flowering.
- Probably in the fifties is ideal but a cool, above freezing basement is
- much better that a 68oF living space.
-
- 5. Bark injury
- Making a spiral cut with a knife around a major branch will restrict the
- flow of nutrients from the leaves to the roots because this flow is
- mostly in the green cambium layer between the bark and the sapwood of
- the tree. Nutrients can still flow from the roots to the leaves via the
- sapwood and the bark injury will heal over in time, but this trick often
- convinces trees to flower since they get the signal that the roots are
- happy, more or less. Warning, be careful and experiment first on a minor
- limb because you may kill it also.
-