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Discussion Starter · #1 ·
I planted an Aquatic Onion Bulb ( crinum thaianum ) about a month ago and it will not grow. The outer layer of the onion bulb is gone so the bulb is white in color. It is planted about 1/4 of the way in my 20 gallon tank. I lifted it out of the gravel and there are still not roots - just the brown remnants cropped to the bulb of the old roots. The bulb is definitely not rotted. I have it planted in the back of the aquarium because I heard that when the leaves come out, they can get very long.

I got these Aqua Plant Bulbs from Petco in a small package which says they are guaranteed to grow within 30 days, and 2 of the 4 Aponogetons and the Waterlily bulb did grow.

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Water conditions:

20 gallon freshwater tank

PH 7.6
Ammonia 1.0
Nitrite 0.50
Nitrate 2
Aquarium Salt about 1/2 teaspoon per gallon

(my tank is cycling again after use of Tetra Lifeguard for treatment of Ich in fish)

Lighting: 1 aquarium florescent GE plant light F15T8
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I do not want to remove the bulb - I want to stick with this to see if it will ever grow.

Can you make any suggestions to get this bulb to grow?
 

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Funny that the bulb didn't sprout but the Apono's did; I had the opposite experience a long time ago.

The bulb will probably eventually spit out some leaves, but you may have some fish nibbling on the fresh growth as well.

I suggest not dosing salts into the aquarium. Most freshwater plants are only moderately tolerant of salt, and even those that are seem to grow better without it.
 

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the crinum genus needs a long period of time to develop its root structure. before it grows typically as long as 6-8 weeks even.
 

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Discussion Starter · #4 ·
I pulled the aquatic onion bulb out of the sand. It is completely white because the outer brown layer has come off, but there still are no roots at all - only some brown remnants (cut back completely) from when the bulb was dried out. It will be interesting to see if anything happens in the next 4 weeks, since that will take it beyond 8 weeks.
 

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every time you move it, reset the counter, plant it and leave it alone for up to 2 months
 

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it does happen sometimes. that genus of plants develop extensive root structures. one established the grow rapidly

root tabs do them well
 
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